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Good Morning, when I create a nova instance with a flavor a get an Error : No valid host was found. There are not enough hosts available Code 500 D├ętails: << File "/opt/stack/nova/nova/conductor/manager.py", line 1113, in schedule_and_build_instances instance_uuids, return_alternates=True) File "/opt/stack/nova/nova/conductor/manager.py", line 715, in _schedule_instances return_alternates=return_alternates) File "/opt/stack/nova/nova/scheduler/utils.py", line 840, in wrapped return func(args, *kwargs) File "/opt/stack/nova/nova/scheduler/client/__init__.py", line 53, in select_destinations instance_uuids, return_objects, return_alternates) File "/opt/stack/nova/nova/scheduler/client/__init__.py", line 37, in __run_method return getattr(self.instance, __name)(args, *kwargs) File "/opt/stack/nova/nova/scheduler/client/query.py", line 42, in select_destinations instance_uuids, return_objects, return_alternates) File "/opt/stack/nova/nova/scheduler/rpcapi.py", line 158, in select_destinations return cctxt.call(ctxt, 'select_destinations', **msg_args) File "/usr/local/lib/python2.7/dist-packages/oslo_messaging/rpc/client.py", line 179, in call retry=self.retry) File "/usr/local/lib/python2.7/dist-packages/oslo_messaging/transport.py", line 133, in _send retry=retry) File "/usr/local/lib/python2.7/dist-packages/oslo_messaging/_drivers/amqpdriver.py", line 584, in send call_monitor_timeout, retry=retry) File "/usr/local/lib/python2.7/dist-packages/oslo_messaging/_drivers/amqpdriver.py", line 575, in _send raise result>>

Any help, will be very appreciated. Thanks in advance Francesco