# Pastebin W2vCpvmn
2017-11-28 22:13:10.710 44686 ERROR nova.conductor.manager [req-e6a06e6f-5797-4cf5-81dd-3ec2aceb582e 4ac237f6708e4f0688589ce4efcae6af 850ecb27752344278c8816a39e26b6cd - 7565538147a74fc3add7dc0086b6ff1a 7565538147a74fc3add7dc0086b6ff1a] Failed to schedule instances: NoValidHost_Remote: No valid host was found.
Traceback (most recent call last):

  File "/usr/lib/python2.7/dist-packages/oslo_messaging/rpc/server.py", line 232, in inner
    return func(*args, **kwargs)

  File "/usr/lib/python2.7/dist-packages/nova/scheduler/manager.py", line 137, in select_destinations
    raise exception.NoValidHost(reason="")

NoValidHost: No valid host was found.
2017-11-28 22:13:10.710 44686 ERROR nova.conductor.manager Traceback (most recent call last):
2017-11-28 22:13:10.710 44686 ERROR nova.conductor.manager   File "/usr/lib/python2.7/dist-packages/nova/conductor/manager.py", line 1027, in schedule_and_build_instances
2017-11-28 22:13:10.710 44686 ERROR nova.conductor.manager     instance_uuids)
2017-11-28 22:13:10.710 44686 ERROR nova.conductor.manager   File "/usr/lib/python2.7/dist-packages/nova/conductor/manager.py", line 626, in _schedule_instances
2017-11-28 22:13:10.710 44686 ERROR nova.conductor.manager     request_spec, instance_uuids)
2017-11-28 22:13:10.710 44686 ERROR nova.conductor.manager   File "/usr/lib/python2.7/dist-packages/nova/scheduler/utils.py", line 586, in wrapped
2017-11-28 22:13:10.710 44686 ERROR nova.conductor.manager     return func(*args, **kwargs)
2017-11-28 22:13:10.710 44686 ERROR nova.conductor.manager   File "/usr/lib/python2.7/dist-packages/nova/scheduler/client/__init__.py", line 52, in select_destinations
2017-11-28 22:13:10.710 44686 ERROR nova.conductor.manager     instance_uuids)
2017-11-28 22:13:10.710 44686 ERROR nova.conductor.manager   File "/usr/lib/python2.7/dist-packages/nova/scheduler/client/__init__.py", line 37, in __run_method
2017-11-28 22:13:10.710 44686 ERROR nova.conductor.manager     return getattr(self.instance, __name)(*args, **kwargs)
2017-11-28 22:13:10.710 44686 ERROR nova.conductor.manager   File "/usr/lib/python2.7/dist-packages/nova/scheduler/client/query.py", line 33, in select_destinations
2017-11-28 22:13:10.710 44686 ERROR nova.conductor.manager     instance_uuids)
2017-11-28 22:13:10.710 44686 ERROR nova.conductor.manager   File "/usr/lib/python2.7/dist-packages/nova/scheduler/rpcapi.py", line 137, in select_destinations
2017-11-28 22:13:10.710 44686 ERROR nova.conductor.manager     return cctxt.call(ctxt, 'select_destinations', **msg_args)
2017-11-28 22:13:10.710 44686 ERROR nova.conductor.manager   File "/usr/lib/python2.7/dist-packages/oslo_messaging/rpc/client.py", line 169, in call
2017-11-28 22:13:10.710 44686 ERROR nova.conductor.manager     retry=self.retry)
2017-11-28 22:13:10.710 44686 ERROR nova.conductor.manager   File "/usr/lib/python2.7/dist-packages/oslo_messaging/transport.py", line 123, in _send
2017-11-28 22:13:10.710 44686 ERROR nova.conductor.manager     timeout=timeout, retry=retry)
2017-11-28 22:13:10.710 44686 ERROR nova.conductor.manager   File "/usr/lib/python2.7/dist-packages/oslo_messaging/_drivers/amqpdriver.py", line 578, in send
2017-11-28 22:13:10.710 44686 ERROR nova.conductor.manager     retry=retry)
2017-11-28 22:13:10.710 44686 ERROR nova.conductor.manager   File "/usr/lib/python2.7/dist-packages/oslo_messaging/_drivers/amqpdriver.py", line 569, in _send
2017-11-28 22:13:10.710 44686 ERROR nova.conductor.manager     raise result
2017-11-28 22:13:10.710 44686 ERROR nova.conductor.manager NoValidHost_Remote: No valid host was found.
2017-11-28 22:13:10.710 44686 ERROR nova.conductor.manager Traceback (most recent call last):
2017-11-28 22:13:10.710 44686 ERROR nova.conductor.manager
2017-11-28 22:13:10.710 44686 ERROR nova.conductor.manager   File "/usr/lib/python2.7/dist-packages/oslo_messaging/rpc/server.py", line 232, in inner
2017-11-28 22:13:10.710 44686 ERROR nova.conductor.manager     return func(*args, **kwargs)
2017-11-28 22:13:10.710 44686 ERROR nova.conductor.manager
2017-11-28 22:13:10.710 44686 ERROR nova.conductor.manager   File "/usr/lib/python2.7/dist-packages/nova/scheduler/manager.py", line 137, in select_destinations
2017-11-28 22:13:10.710 44686 ERROR nova.conductor.manager     raise exception.NoValidHost(reason="")
2017-11-28 22:13:10.710 44686 ERROR nova.conductor.manager
2017-11-28 22:13:10.710 44686 ERROR nova.conductor.manager NoValidHost: No valid host was found.
2017-11-28 22:13:10.710 44686 ERROR nova.conductor.manager
2017-11-28 22:13:10.710 44686 ERROR nova.conductor.manager
2017-11-28 22:13:10.811 44686 WARNING nova.scheduler.utils [req-e6a06e6f-5797-4cf5-81dd-3ec2aceb582e 4ac237f6708e4f0688589ce4efcae6af 850ecb27752344278c8816a39e26b6cd - 7565538147a74fc3add7dc0086b6ff1a 7565538147a74fc3add7dc0086b6ff1a] Failed to compute_task_build_instances: No valid host was found.
Traceback (most recent call last):

  File "/usr/lib/python2.7/dist-packages/oslo_messaging/rpc/server.py", line 232, in inner
    return func(*args, **kwargs)

  File "/usr/lib/python2.7/dist-packages/nova/scheduler/manager.py", line 137, in select_destinations
    raise exception.NoValidHost(reason="")

NoValidHost: No valid host was found.
: NoValidHost_Remote: No valid host was found.
Traceback (most recent call last):

  File "/usr/lib/python2.7/dist-packages/oslo_messaging/rpc/server.py", line 232, in inner
    return func(*args, **kwargs)

  File "/usr/lib/python2.7/dist-packages/nova/scheduler/manager.py", line 137, in select_destinations
    raise exception.NoValidHost(reason="")

NoValidHost: No valid host was found.