+ exec nova-conductor --config-file /etc/nova/nova.conf
2026-08-22 15:12:57.764 1 INFO nova.utils [None req-2ddcb1d8-02c7-4f38-8a0a-cf4425e0357f - - - - - -] The cell worker thread pool MainProcess.cell_worker is initialized
2026-08-22 15:12:57.852 1 INFO oslo_service.backend._eventlet.service [None req-2ddcb1d8-02c7-4f38-8a0a-cf4425e0357f - - - - - -] Starting 2 workers
2026-08-22 15:12:57.860 7 INFO nova.service [-] Starting conductor node (version 32.2.2)
2026-08-22 15:12:57.860 8 INFO nova.service [-] Starting conductor node (version 32.2.2)
2026-08-22 15:12:57.865 1 WARNING oslo_config.cfg [None req-2ddcb1d8-02c7-4f38-8a0a-cf4425e0357f - - - - - -] Deprecated: Option "api_servers" from group "glance" is deprecated for removal (
Support for image service configuration via standard keystoneauth1 Adapter
options was added in the 17.0.0 Queens release. The api_servers option was
retained temporarily to allow consumers time to cut over to a real load
balancing solution.
).  Its value may be silently ignored in the future.
2026-08-22 15:49:24.628 8 ERROR nova.conductor.manager [None req-7c5b0667-1183-4fa6-bbff-fbd710bf6ec7 922fd08b70b74001a43e12e87a1d1674 a4bf1584358244edb7c2eca82775eda8 - - default default] Failed to schedule instances: nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
Traceback (most recent call last):

  File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/server.py", line 269, in inner
    return func(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^

  File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/manager.py", line 255, in select_destinations
    raise exception.NoValidHost(reason="")

nova.exception.NoValidHost: No valid host was found.
2026-08-22 15:49:24.628 8 ERROR nova.conductor.manager Traceback (most recent call last):
2026-08-22 15:49:24.628 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/conductor/manager.py", line 1654, in schedule_and_build_instances
2026-08-22 15:49:24.628 8 ERROR nova.conductor.manager     host_lists = self._schedule_instances(context, request_specs[0],
2026-08-22 15:49:24.628 8 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:49:24.628 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/conductor/manager.py", line 942, in _schedule_instances
2026-08-22 15:49:24.628 8 ERROR nova.conductor.manager     host_lists = self.query_client.select_destinations(
2026-08-22 15:49:24.628 8 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:49:24.628 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/client/query.py", line 41, in select_destinations
2026-08-22 15:49:24.628 8 ERROR nova.conductor.manager     return self.scheduler_rpcapi.select_destinations(context, spec_obj,
2026-08-22 15:49:24.628 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:49:24.628 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/rpcapi.py", line 160, in select_destinations
2026-08-22 15:49:24.628 8 ERROR nova.conductor.manager     return cctxt.call(ctxt, 'select_destinations', **msg_args)
2026-08-22 15:49:24.628 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:49:24.628 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/client.py", line 180, in call
2026-08-22 15:49:24.628 8 ERROR nova.conductor.manager     result = self.transport._send(
2026-08-22 15:49:24.628 8 ERROR nova.conductor.manager              ^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:49:24.628 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/transport.py", line 123, in _send
2026-08-22 15:49:24.628 8 ERROR nova.conductor.manager     return self._driver.send(target, ctxt, message,
2026-08-22 15:49:24.628 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:49:24.628 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 794, in send
2026-08-22 15:49:24.628 8 ERROR nova.conductor.manager     return self._send(target, ctxt, message, wait_for_reply, timeout,
2026-08-22 15:49:24.628 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:49:24.628 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 786, in _send
2026-08-22 15:49:24.628 8 ERROR nova.conductor.manager     raise result
2026-08-22 15:49:24.628 8 ERROR nova.conductor.manager nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-08-22 15:49:24.628 8 ERROR nova.conductor.manager Traceback (most recent call last):
2026-08-22 15:49:24.628 8 ERROR nova.conductor.manager 
2026-08-22 15:49:24.628 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/server.py", line 269, in inner
2026-08-22 15:49:24.628 8 ERROR nova.conductor.manager     return func(*args, **kwargs)
2026-08-22 15:49:24.628 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:49:24.628 8 ERROR nova.conductor.manager 
2026-08-22 15:49:24.628 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/manager.py", line 255, in select_destinations
2026-08-22 15:49:24.628 8 ERROR nova.conductor.manager     raise exception.NoValidHost(reason="")
2026-08-22 15:49:24.628 8 ERROR nova.conductor.manager 
2026-08-22 15:49:24.628 8 ERROR nova.conductor.manager nova.exception.NoValidHost: No valid host was found. 
2026-08-22 15:49:24.628 8 ERROR nova.conductor.manager 
2026-08-22 15:49:24.628 8 ERROR nova.conductor.manager 
2026-08-22 15:49:24.817 8 WARNING nova.scheduler.utils [None req-7c5b0667-1183-4fa6-bbff-fbd710bf6ec7 922fd08b70b74001a43e12e87a1d1674 a4bf1584358244edb7c2eca82775eda8 - - default default] Failed to compute_task_build_instances: No valid host was found. 
Traceback (most recent call last):

  File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/server.py", line 269, in inner
    return func(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^

  File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/manager.py", line 255, in select_destinations
    raise exception.NoValidHost(reason="")

nova.exception.NoValidHost: No valid host was found. 
: nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-08-22 15:49:24.818 8 WARNING nova.scheduler.utils [None req-7c5b0667-1183-4fa6-bbff-fbd710bf6ec7 922fd08b70b74001a43e12e87a1d1674 a4bf1584358244edb7c2eca82775eda8 - - default default] [instance: 79ee50b1-59cf-4f3d-b1f0-e6323b2f7992] Setting instance to ERROR state.: nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-08-22 15:49:24.861 8 WARNING oslo_config.cfg [None req-7c5b0667-1183-4fa6-bbff-fbd710bf6ec7 922fd08b70b74001a43e12e87a1d1674 a4bf1584358244edb7c2eca82775eda8 - - default default] Deprecated: Option "api_servers" from group "glance" is deprecated for removal (
Support for image service configuration via standard keystoneauth1 Adapter
options was added in the 17.0.0 Queens release. The api_servers option was
retained temporarily to allow consumers time to cut over to a real load
balancing solution.
).  Its value may be silently ignored in the future.: nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-08-22 15:49:30.193 7 ERROR nova.conductor.manager [None req-ea3669a3-afb2-4283-a0ff-e252760fe054 617d7ce8616e4539be3180fedd8820ed 80b43b72390d4c0e9c0299962cb5d683 - - default default] Failed to schedule instances: nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
Traceback (most recent call last):

  File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/server.py", line 269, in inner
    return func(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^

  File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/manager.py", line 255, in select_destinations
    raise exception.NoValidHost(reason="")

nova.exception.NoValidHost: No valid host was found.
2026-08-22 15:49:30.193 7 ERROR nova.conductor.manager Traceback (most recent call last):
2026-08-22 15:49:30.193 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/conductor/manager.py", line 1654, in schedule_and_build_instances
2026-08-22 15:49:30.193 7 ERROR nova.conductor.manager     host_lists = self._schedule_instances(context, request_specs[0],
2026-08-22 15:49:30.193 7 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:49:30.193 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/conductor/manager.py", line 942, in _schedule_instances
2026-08-22 15:49:30.193 7 ERROR nova.conductor.manager     host_lists = self.query_client.select_destinations(
2026-08-22 15:49:30.193 7 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:49:30.193 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/client/query.py", line 41, in select_destinations
2026-08-22 15:49:30.193 7 ERROR nova.conductor.manager     return self.scheduler_rpcapi.select_destinations(context, spec_obj,
2026-08-22 15:49:30.193 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:49:30.193 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/rpcapi.py", line 160, in select_destinations
2026-08-22 15:49:30.193 7 ERROR nova.conductor.manager     return cctxt.call(ctxt, 'select_destinations', **msg_args)
2026-08-22 15:49:30.193 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:49:30.193 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/client.py", line 180, in call
2026-08-22 15:49:30.193 7 ERROR nova.conductor.manager     result = self.transport._send(
2026-08-22 15:49:30.193 7 ERROR nova.conductor.manager              ^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:49:30.193 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/transport.py", line 123, in _send
2026-08-22 15:49:30.193 7 ERROR nova.conductor.manager     return self._driver.send(target, ctxt, message,
2026-08-22 15:49:30.193 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:49:30.193 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 794, in send
2026-08-22 15:49:30.193 7 ERROR nova.conductor.manager     return self._send(target, ctxt, message, wait_for_reply, timeout,
2026-08-22 15:49:30.193 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:49:30.193 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 786, in _send
2026-08-22 15:49:30.193 7 ERROR nova.conductor.manager     raise result
2026-08-22 15:49:30.193 7 ERROR nova.conductor.manager nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-08-22 15:49:30.193 7 ERROR nova.conductor.manager Traceback (most recent call last):
2026-08-22 15:49:30.193 7 ERROR nova.conductor.manager 
2026-08-22 15:49:30.193 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/server.py", line 269, in inner
2026-08-22 15:49:30.193 7 ERROR nova.conductor.manager     return func(*args, **kwargs)
2026-08-22 15:49:30.193 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:49:30.193 7 ERROR nova.conductor.manager 
2026-08-22 15:49:30.193 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/manager.py", line 255, in select_destinations
2026-08-22 15:49:30.193 7 ERROR nova.conductor.manager     raise exception.NoValidHost(reason="")
2026-08-22 15:49:30.193 7 ERROR nova.conductor.manager 
2026-08-22 15:49:30.193 7 ERROR nova.conductor.manager nova.exception.NoValidHost: No valid host was found. 
2026-08-22 15:49:30.193 7 ERROR nova.conductor.manager 
2026-08-22 15:49:30.193 7 ERROR nova.conductor.manager 
2026-08-22 15:49:30.390 7 WARNING nova.scheduler.utils [None req-ea3669a3-afb2-4283-a0ff-e252760fe054 617d7ce8616e4539be3180fedd8820ed 80b43b72390d4c0e9c0299962cb5d683 - - default default] Failed to compute_task_build_instances: No valid host was found. 
Traceback (most recent call last):

  File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/server.py", line 269, in inner
    return func(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^

  File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/manager.py", line 255, in select_destinations
    raise exception.NoValidHost(reason="")

nova.exception.NoValidHost: No valid host was found. 
: nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-08-22 15:49:30.392 7 WARNING nova.scheduler.utils [None req-ea3669a3-afb2-4283-a0ff-e252760fe054 617d7ce8616e4539be3180fedd8820ed 80b43b72390d4c0e9c0299962cb5d683 - - default default] [instance: 1d3f8ccc-4d50-47f4-80ac-96c10a0cfb6d] Setting instance to ERROR state.: nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-08-22 15:49:30.433 7 WARNING oslo_config.cfg [None req-ea3669a3-afb2-4283-a0ff-e252760fe054 617d7ce8616e4539be3180fedd8820ed 80b43b72390d4c0e9c0299962cb5d683 - - default default] Deprecated: Option "api_servers" from group "glance" is deprecated for removal (
Support for image service configuration via standard keystoneauth1 Adapter
options was added in the 17.0.0 Queens release. The api_servers option was
retained temporarily to allow consumers time to cut over to a real load
balancing solution.
).  Its value may be silently ignored in the future.: nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-08-22 15:49:46.314 8 ERROR nova.conductor.manager [None req-4cc5cae3-1d56-452f-a64f-6d9b209f3cb0 f8629424e08449a1b2f5782b3eb95ded 496c613d02694b19993f513eb22eb3ba - - default default] Failed to schedule instances: nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
Traceback (most recent call last):

  File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/server.py", line 269, in inner
    return func(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^

  File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/manager.py", line 255, in select_destinations
    raise exception.NoValidHost(reason="")

nova.exception.NoValidHost: No valid host was found.
2026-08-22 15:49:46.314 8 ERROR nova.conductor.manager Traceback (most recent call last):
2026-08-22 15:49:46.314 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/conductor/manager.py", line 1654, in schedule_and_build_instances
2026-08-22 15:49:46.314 8 ERROR nova.conductor.manager     host_lists = self._schedule_instances(context, request_specs[0],
2026-08-22 15:49:46.314 8 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:49:46.314 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/conductor/manager.py", line 942, in _schedule_instances
2026-08-22 15:49:46.314 8 ERROR nova.conductor.manager     host_lists = self.query_client.select_destinations(
2026-08-22 15:49:46.314 8 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:49:46.314 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/client/query.py", line 41, in select_destinations
2026-08-22 15:49:46.314 8 ERROR nova.conductor.manager     return self.scheduler_rpcapi.select_destinations(context, spec_obj,
2026-08-22 15:49:46.314 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:49:46.314 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/rpcapi.py", line 160, in select_destinations
2026-08-22 15:49:46.314 8 ERROR nova.conductor.manager     return cctxt.call(ctxt, 'select_destinations', **msg_args)
2026-08-22 15:49:46.314 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:49:46.314 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/client.py", line 180, in call
2026-08-22 15:49:46.314 8 ERROR nova.conductor.manager     result = self.transport._send(
2026-08-22 15:49:46.314 8 ERROR nova.conductor.manager              ^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:49:46.314 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/transport.py", line 123, in _send
2026-08-22 15:49:46.314 8 ERROR nova.conductor.manager     return self._driver.send(target, ctxt, message,
2026-08-22 15:49:46.314 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:49:46.314 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 794, in send
2026-08-22 15:49:46.314 8 ERROR nova.conductor.manager     return self._send(target, ctxt, message, wait_for_reply, timeout,
2026-08-22 15:49:46.314 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:49:46.314 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 786, in _send
2026-08-22 15:49:46.314 8 ERROR nova.conductor.manager     raise result
2026-08-22 15:49:46.314 8 ERROR nova.conductor.manager nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-08-22 15:49:46.314 8 ERROR nova.conductor.manager Traceback (most recent call last):
2026-08-22 15:49:46.314 8 ERROR nova.conductor.manager 
2026-08-22 15:49:46.314 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/server.py", line 269, in inner
2026-08-22 15:49:46.314 8 ERROR nova.conductor.manager     return func(*args, **kwargs)
2026-08-22 15:49:46.314 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:49:46.314 8 ERROR nova.conductor.manager 
2026-08-22 15:49:46.314 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/manager.py", line 255, in select_destinations
2026-08-22 15:49:46.314 8 ERROR nova.conductor.manager     raise exception.NoValidHost(reason="")
2026-08-22 15:49:46.314 8 ERROR nova.conductor.manager 
2026-08-22 15:49:46.314 8 ERROR nova.conductor.manager nova.exception.NoValidHost: No valid host was found. 
2026-08-22 15:49:46.314 8 ERROR nova.conductor.manager 
2026-08-22 15:49:46.314 8 ERROR nova.conductor.manager 
2026-08-22 15:49:46.391 8 WARNING nova.scheduler.utils [None req-4cc5cae3-1d56-452f-a64f-6d9b209f3cb0 f8629424e08449a1b2f5782b3eb95ded 496c613d02694b19993f513eb22eb3ba - - default default] Failed to compute_task_build_instances: No valid host was found. 
Traceback (most recent call last):

  File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/server.py", line 269, in inner
    return func(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^

  File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/manager.py", line 255, in select_destinations
    raise exception.NoValidHost(reason="")

nova.exception.NoValidHost: No valid host was found. 
: nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-08-22 15:49:46.392 8 WARNING nova.scheduler.utils [None req-4cc5cae3-1d56-452f-a64f-6d9b209f3cb0 f8629424e08449a1b2f5782b3eb95ded 496c613d02694b19993f513eb22eb3ba - - default default] [instance: 00d8fcc8-c2e9-4224-bc73-d4033ff602bd] Setting instance to ERROR state.: nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-08-22 15:49:46.522 7 ERROR nova.conductor.manager [None req-aabd2817-1517-4962-a9df-06794de722ed 292c4c633cad4e359e2ed4045a760881 cdd1c83eca9942058b3ee6bc4a2641b3 - - default default] Failed to schedule instances: nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
Traceback (most recent call last):

  File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/server.py", line 269, in inner
    return func(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^

  File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/manager.py", line 255, in select_destinations
    raise exception.NoValidHost(reason="")

nova.exception.NoValidHost: No valid host was found.
2026-08-22 15:49:46.522 7 ERROR nova.conductor.manager Traceback (most recent call last):
2026-08-22 15:49:46.522 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/conductor/manager.py", line 1654, in schedule_and_build_instances
2026-08-22 15:49:46.522 7 ERROR nova.conductor.manager     host_lists = self._schedule_instances(context, request_specs[0],
2026-08-22 15:49:46.522 7 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:49:46.522 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/conductor/manager.py", line 942, in _schedule_instances
2026-08-22 15:49:46.522 7 ERROR nova.conductor.manager     host_lists = self.query_client.select_destinations(
2026-08-22 15:49:46.522 7 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:49:46.522 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/client/query.py", line 41, in select_destinations
2026-08-22 15:49:46.522 7 ERROR nova.conductor.manager     return self.scheduler_rpcapi.select_destinations(context, spec_obj,
2026-08-22 15:49:46.522 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:49:46.522 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/rpcapi.py", line 160, in select_destinations
2026-08-22 15:49:46.522 7 ERROR nova.conductor.manager     return cctxt.call(ctxt, 'select_destinations', **msg_args)
2026-08-22 15:49:46.522 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:49:46.522 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/client.py", line 180, in call
2026-08-22 15:49:46.522 7 ERROR nova.conductor.manager     result = self.transport._send(
2026-08-22 15:49:46.522 7 ERROR nova.conductor.manager              ^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:49:46.522 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/transport.py", line 123, in _send
2026-08-22 15:49:46.522 7 ERROR nova.conductor.manager     return self._driver.send(target, ctxt, message,
2026-08-22 15:49:46.522 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:49:46.522 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 794, in send
2026-08-22 15:49:46.522 7 ERROR nova.conductor.manager     return self._send(target, ctxt, message, wait_for_reply, timeout,
2026-08-22 15:49:46.522 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:49:46.522 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 786, in _send
2026-08-22 15:49:46.522 7 ERROR nova.conductor.manager     raise result
2026-08-22 15:49:46.522 7 ERROR nova.conductor.manager nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-08-22 15:49:46.522 7 ERROR nova.conductor.manager Traceback (most recent call last):
2026-08-22 15:49:46.522 7 ERROR nova.conductor.manager 
2026-08-22 15:49:46.522 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/server.py", line 269, in inner
2026-08-22 15:49:46.522 7 ERROR nova.conductor.manager     return func(*args, **kwargs)
2026-08-22 15:49:46.522 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:49:46.522 7 ERROR nova.conductor.manager 
2026-08-22 15:49:46.522 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/manager.py", line 255, in select_destinations
2026-08-22 15:49:46.522 7 ERROR nova.conductor.manager     raise exception.NoValidHost(reason="")
2026-08-22 15:49:46.522 7 ERROR nova.conductor.manager 
2026-08-22 15:49:46.522 7 ERROR nova.conductor.manager nova.exception.NoValidHost: No valid host was found. 
2026-08-22 15:49:46.522 7 ERROR nova.conductor.manager 
2026-08-22 15:49:46.522 7 ERROR nova.conductor.manager 
2026-08-22 15:49:46.659 7 WARNING nova.scheduler.utils [None req-aabd2817-1517-4962-a9df-06794de722ed 292c4c633cad4e359e2ed4045a760881 cdd1c83eca9942058b3ee6bc4a2641b3 - - default default] Failed to compute_task_build_instances: No valid host was found. 
Traceback (most recent call last):

  File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/server.py", line 269, in inner
    return func(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^

  File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/manager.py", line 255, in select_destinations
    raise exception.NoValidHost(reason="")

nova.exception.NoValidHost: No valid host was found. 
: nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-08-22 15:49:46.660 7 WARNING nova.scheduler.utils [None req-aabd2817-1517-4962-a9df-06794de722ed 292c4c633cad4e359e2ed4045a760881 cdd1c83eca9942058b3ee6bc4a2641b3 - - default default] [instance: b10ca45b-7aff-4d9e-ac65-b86bdaab69f2] Setting instance to ERROR state.: nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-08-22 15:49:47.661 8 ERROR nova.conductor.manager [None req-07ab1bb3-5c05-4bf7-8fe9-25b431d0405d c7f53b8d8daf46aab3446b357d608f45 ee014b12ddb548c881e7010cd719c335 - - default default] Failed to schedule instances: nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
Traceback (most recent call last):

  File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/server.py", line 269, in inner
    return func(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^

  File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/manager.py", line 255, in select_destinations
    raise exception.NoValidHost(reason="")

nova.exception.NoValidHost: No valid host was found.
2026-08-22 15:49:47.661 8 ERROR nova.conductor.manager Traceback (most recent call last):
2026-08-22 15:49:47.661 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/conductor/manager.py", line 1654, in schedule_and_build_instances
2026-08-22 15:49:47.661 8 ERROR nova.conductor.manager     host_lists = self._schedule_instances(context, request_specs[0],
2026-08-22 15:49:47.661 8 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:49:47.661 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/conductor/manager.py", line 942, in _schedule_instances
2026-08-22 15:49:47.661 8 ERROR nova.conductor.manager     host_lists = self.query_client.select_destinations(
2026-08-22 15:49:47.661 8 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:49:47.661 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/client/query.py", line 41, in select_destinations
2026-08-22 15:49:47.661 8 ERROR nova.conductor.manager     return self.scheduler_rpcapi.select_destinations(context, spec_obj,
2026-08-22 15:49:47.661 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:49:47.661 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/rpcapi.py", line 160, in select_destinations
2026-08-22 15:49:47.661 8 ERROR nova.conductor.manager     return cctxt.call(ctxt, 'select_destinations', **msg_args)
2026-08-22 15:49:47.661 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:49:47.661 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/client.py", line 180, in call
2026-08-22 15:49:47.661 8 ERROR nova.conductor.manager     result = self.transport._send(
2026-08-22 15:49:47.661 8 ERROR nova.conductor.manager              ^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:49:47.661 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/transport.py", line 123, in _send
2026-08-22 15:49:47.661 8 ERROR nova.conductor.manager     return self._driver.send(target, ctxt, message,
2026-08-22 15:49:47.661 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:49:47.661 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 794, in send
2026-08-22 15:49:47.661 8 ERROR nova.conductor.manager     return self._send(target, ctxt, message, wait_for_reply, timeout,
2026-08-22 15:49:47.661 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:49:47.661 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 786, in _send
2026-08-22 15:49:47.661 8 ERROR nova.conductor.manager     raise result
2026-08-22 15:49:47.661 8 ERROR nova.conductor.manager nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-08-22 15:49:47.661 8 ERROR nova.conductor.manager Traceback (most recent call last):
2026-08-22 15:49:47.661 8 ERROR nova.conductor.manager 
2026-08-22 15:49:47.661 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/server.py", line 269, in inner
2026-08-22 15:49:47.661 8 ERROR nova.conductor.manager     return func(*args, **kwargs)
2026-08-22 15:49:47.661 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:49:47.661 8 ERROR nova.conductor.manager 
2026-08-22 15:49:47.661 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/manager.py", line 255, in select_destinations
2026-08-22 15:49:47.661 8 ERROR nova.conductor.manager     raise exception.NoValidHost(reason="")
2026-08-22 15:49:47.661 8 ERROR nova.conductor.manager 
2026-08-22 15:49:47.661 8 ERROR nova.conductor.manager nova.exception.NoValidHost: No valid host was found. 
2026-08-22 15:49:47.661 8 ERROR nova.conductor.manager 
2026-08-22 15:49:47.661 8 ERROR nova.conductor.manager 
2026-08-22 15:49:47.746 8 WARNING nova.scheduler.utils [None req-07ab1bb3-5c05-4bf7-8fe9-25b431d0405d c7f53b8d8daf46aab3446b357d608f45 ee014b12ddb548c881e7010cd719c335 - - default default] Failed to compute_task_build_instances: No valid host was found. 
Traceback (most recent call last):

  File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/server.py", line 269, in inner
    return func(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^

  File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/manager.py", line 255, in select_destinations
    raise exception.NoValidHost(reason="")

nova.exception.NoValidHost: No valid host was found. 
: nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-08-22 15:49:47.747 8 WARNING nova.scheduler.utils [None req-07ab1bb3-5c05-4bf7-8fe9-25b431d0405d c7f53b8d8daf46aab3446b357d608f45 ee014b12ddb548c881e7010cd719c335 - - default default] [instance: d16e3151-978c-43ab-849e-8b599e03ad77] Setting instance to ERROR state.: nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-08-22 15:50:02.599 7 ERROR nova.conductor.manager [None req-bc2bde66-0e5b-4113-9ffd-0aeee9faaf72 0e7f72db304a4ede94a138eec8854f24 5c0c76ceb3d44fbbae03be09b803d10c - - default default] Failed to schedule instances: nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
Traceback (most recent call last):

  File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/server.py", line 269, in inner
    return func(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^

  File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/manager.py", line 255, in select_destinations
    raise exception.NoValidHost(reason="")

nova.exception.NoValidHost: No valid host was found.
2026-08-22 15:50:02.599 7 ERROR nova.conductor.manager Traceback (most recent call last):
2026-08-22 15:50:02.599 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/conductor/manager.py", line 1654, in schedule_and_build_instances
2026-08-22 15:50:02.599 7 ERROR nova.conductor.manager     host_lists = self._schedule_instances(context, request_specs[0],
2026-08-22 15:50:02.599 7 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:50:02.599 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/conductor/manager.py", line 942, in _schedule_instances
2026-08-22 15:50:02.599 7 ERROR nova.conductor.manager     host_lists = self.query_client.select_destinations(
2026-08-22 15:50:02.599 7 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:50:02.599 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/client/query.py", line 41, in select_destinations
2026-08-22 15:50:02.599 7 ERROR nova.conductor.manager     return self.scheduler_rpcapi.select_destinations(context, spec_obj,
2026-08-22 15:50:02.599 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:50:02.599 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/rpcapi.py", line 160, in select_destinations
2026-08-22 15:50:02.599 7 ERROR nova.conductor.manager     return cctxt.call(ctxt, 'select_destinations', **msg_args)
2026-08-22 15:50:02.599 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:50:02.599 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/client.py", line 180, in call
2026-08-22 15:50:02.599 7 ERROR nova.conductor.manager     result = self.transport._send(
2026-08-22 15:50:02.599 7 ERROR nova.conductor.manager              ^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:50:02.599 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/transport.py", line 123, in _send
2026-08-22 15:50:02.599 7 ERROR nova.conductor.manager     return self._driver.send(target, ctxt, message,
2026-08-22 15:50:02.599 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:50:02.599 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 794, in send
2026-08-22 15:50:02.599 7 ERROR nova.conductor.manager     return self._send(target, ctxt, message, wait_for_reply, timeout,
2026-08-22 15:50:02.599 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:50:02.599 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 786, in _send
2026-08-22 15:50:02.599 7 ERROR nova.conductor.manager     raise result
2026-08-22 15:50:02.599 7 ERROR nova.conductor.manager nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-08-22 15:50:02.599 7 ERROR nova.conductor.manager Traceback (most recent call last):
2026-08-22 15:50:02.599 7 ERROR nova.conductor.manager 
2026-08-22 15:50:02.599 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/server.py", line 269, in inner
2026-08-22 15:50:02.599 7 ERROR nova.conductor.manager     return func(*args, **kwargs)
2026-08-22 15:50:02.599 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:50:02.599 7 ERROR nova.conductor.manager 
2026-08-22 15:50:02.599 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/manager.py", line 255, in select_destinations
2026-08-22 15:50:02.599 7 ERROR nova.conductor.manager     raise exception.NoValidHost(reason="")
2026-08-22 15:50:02.599 7 ERROR nova.conductor.manager 
2026-08-22 15:50:02.599 7 ERROR nova.conductor.manager nova.exception.NoValidHost: No valid host was found. 
2026-08-22 15:50:02.599 7 ERROR nova.conductor.manager 
2026-08-22 15:50:02.599 7 ERROR nova.conductor.manager 
2026-08-22 15:50:02.692 7 WARNING nova.scheduler.utils [None req-bc2bde66-0e5b-4113-9ffd-0aeee9faaf72 0e7f72db304a4ede94a138eec8854f24 5c0c76ceb3d44fbbae03be09b803d10c - - default default] Failed to compute_task_build_instances: No valid host was found. 
Traceback (most recent call last):

  File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/server.py", line 269, in inner
    return func(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^

  File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/manager.py", line 255, in select_destinations
    raise exception.NoValidHost(reason="")

nova.exception.NoValidHost: No valid host was found. 
: nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-08-22 15:50:02.692 7 WARNING nova.scheduler.utils [None req-bc2bde66-0e5b-4113-9ffd-0aeee9faaf72 0e7f72db304a4ede94a138eec8854f24 5c0c76ceb3d44fbbae03be09b803d10c - - default default] [instance: 6defa0dd-1f31-4b1e-aaa7-97ee6a69106e] Setting instance to ERROR state.: nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-08-22 15:51:34.420 8 ERROR nova.conductor.manager [None req-66ca77a8-a0e9-4135-b0a4-dfb54d0d00b2 c00cf36bcb5d4533a37196008c578da6 7d88655ecdc94a37bce0638350cec681 - - default default] Failed to schedule instances: nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
Traceback (most recent call last):

  File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/server.py", line 269, in inner
    return func(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^

  File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/manager.py", line 255, in select_destinations
    raise exception.NoValidHost(reason="")

nova.exception.NoValidHost: No valid host was found.
2026-08-22 15:51:34.420 8 ERROR nova.conductor.manager Traceback (most recent call last):
2026-08-22 15:51:34.420 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/conductor/manager.py", line 1654, in schedule_and_build_instances
2026-08-22 15:51:34.420 8 ERROR nova.conductor.manager     host_lists = self._schedule_instances(context, request_specs[0],
2026-08-22 15:51:34.420 8 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:51:34.420 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/conductor/manager.py", line 942, in _schedule_instances
2026-08-22 15:51:34.420 8 ERROR nova.conductor.manager     host_lists = self.query_client.select_destinations(
2026-08-22 15:51:34.420 8 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:51:34.420 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/client/query.py", line 41, in select_destinations
2026-08-22 15:51:34.420 8 ERROR nova.conductor.manager     return self.scheduler_rpcapi.select_destinations(context, spec_obj,
2026-08-22 15:51:34.420 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:51:34.420 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/rpcapi.py", line 160, in select_destinations
2026-08-22 15:51:34.420 8 ERROR nova.conductor.manager     return cctxt.call(ctxt, 'select_destinations', **msg_args)
2026-08-22 15:51:34.420 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:51:34.420 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/client.py", line 180, in call
2026-08-22 15:51:34.420 8 ERROR nova.conductor.manager     result = self.transport._send(
2026-08-22 15:51:34.420 8 ERROR nova.conductor.manager              ^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:51:34.420 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/transport.py", line 123, in _send
2026-08-22 15:51:34.420 8 ERROR nova.conductor.manager     return self._driver.send(target, ctxt, message,
2026-08-22 15:51:34.420 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:51:34.420 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 794, in send
2026-08-22 15:51:34.420 8 ERROR nova.conductor.manager     return self._send(target, ctxt, message, wait_for_reply, timeout,
2026-08-22 15:51:34.420 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:51:34.420 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 786, in _send
2026-08-22 15:51:34.420 8 ERROR nova.conductor.manager     raise result
2026-08-22 15:51:34.420 8 ERROR nova.conductor.manager nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-08-22 15:51:34.420 8 ERROR nova.conductor.manager Traceback (most recent call last):
2026-08-22 15:51:34.420 8 ERROR nova.conductor.manager 
2026-08-22 15:51:34.420 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/server.py", line 269, in inner
2026-08-22 15:51:34.420 8 ERROR nova.conductor.manager     return func(*args, **kwargs)
2026-08-22 15:51:34.420 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:51:34.420 8 ERROR nova.conductor.manager 
2026-08-22 15:51:34.420 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/manager.py", line 255, in select_destinations
2026-08-22 15:51:34.420 8 ERROR nova.conductor.manager     raise exception.NoValidHost(reason="")
2026-08-22 15:51:34.420 8 ERROR nova.conductor.manager 
2026-08-22 15:51:34.420 8 ERROR nova.conductor.manager nova.exception.NoValidHost: No valid host was found. 
2026-08-22 15:51:34.420 8 ERROR nova.conductor.manager 
2026-08-22 15:51:34.420 8 ERROR nova.conductor.manager 
2026-08-22 15:51:34.530 8 WARNING nova.scheduler.utils [None req-66ca77a8-a0e9-4135-b0a4-dfb54d0d00b2 c00cf36bcb5d4533a37196008c578da6 7d88655ecdc94a37bce0638350cec681 - - default default] Failed to compute_task_build_instances: No valid host was found. 
Traceback (most recent call last):

  File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/server.py", line 269, in inner
    return func(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^

  File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/manager.py", line 255, in select_destinations
    raise exception.NoValidHost(reason="")

nova.exception.NoValidHost: No valid host was found. 
: nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-08-22 15:51:34.531 8 WARNING nova.scheduler.utils [None req-66ca77a8-a0e9-4135-b0a4-dfb54d0d00b2 c00cf36bcb5d4533a37196008c578da6 7d88655ecdc94a37bce0638350cec681 - - default default] [instance: 921b85fc-1202-4326-9752-fd7758f907ec] Setting instance to ERROR state.: nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-08-22 15:52:07.937 7 ERROR nova.conductor.manager [None req-c137a7da-cbf4-4d6b-9103-56b6ebd05a7a a4e19ce83e984f0eb37cee928e76ca04 f47dbc4bb57f4cbb9dd3845c3e6874ef - - default default] Failed to schedule instances: nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
Traceback (most recent call last):

  File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/server.py", line 269, in inner
    return func(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^

  File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/manager.py", line 255, in select_destinations
    raise exception.NoValidHost(reason="")

nova.exception.NoValidHost: No valid host was found.
2026-08-22 15:52:07.937 7 ERROR nova.conductor.manager Traceback (most recent call last):
2026-08-22 15:52:07.937 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/conductor/manager.py", line 1654, in schedule_and_build_instances
2026-08-22 15:52:07.937 7 ERROR nova.conductor.manager     host_lists = self._schedule_instances(context, request_specs[0],
2026-08-22 15:52:07.937 7 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:52:07.937 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/conductor/manager.py", line 942, in _schedule_instances
2026-08-22 15:52:07.937 7 ERROR nova.conductor.manager     host_lists = self.query_client.select_destinations(
2026-08-22 15:52:07.937 7 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:52:07.937 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/client/query.py", line 41, in select_destinations
2026-08-22 15:52:07.937 7 ERROR nova.conductor.manager     return self.scheduler_rpcapi.select_destinations(context, spec_obj,
2026-08-22 15:52:07.937 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:52:07.937 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/rpcapi.py", line 160, in select_destinations
2026-08-22 15:52:07.937 7 ERROR nova.conductor.manager     return cctxt.call(ctxt, 'select_destinations', **msg_args)
2026-08-22 15:52:07.937 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:52:07.937 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/client.py", line 180, in call
2026-08-22 15:52:07.937 7 ERROR nova.conductor.manager     result = self.transport._send(
2026-08-22 15:52:07.937 7 ERROR nova.conductor.manager              ^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:52:07.937 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/transport.py", line 123, in _send
2026-08-22 15:52:07.937 7 ERROR nova.conductor.manager     return self._driver.send(target, ctxt, message,
2026-08-22 15:52:07.937 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:52:07.937 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 794, in send
2026-08-22 15:52:07.937 7 ERROR nova.conductor.manager     return self._send(target, ctxt, message, wait_for_reply, timeout,
2026-08-22 15:52:07.937 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:52:07.937 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 786, in _send
2026-08-22 15:52:07.937 7 ERROR nova.conductor.manager     raise result
2026-08-22 15:52:07.937 7 ERROR nova.conductor.manager nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-08-22 15:52:07.937 7 ERROR nova.conductor.manager Traceback (most recent call last):
2026-08-22 15:52:07.937 7 ERROR nova.conductor.manager 
2026-08-22 15:52:07.937 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/server.py", line 269, in inner
2026-08-22 15:52:07.937 7 ERROR nova.conductor.manager     return func(*args, **kwargs)
2026-08-22 15:52:07.937 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:52:07.937 7 ERROR nova.conductor.manager 
2026-08-22 15:52:07.937 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/manager.py", line 255, in select_destinations
2026-08-22 15:52:07.937 7 ERROR nova.conductor.manager     raise exception.NoValidHost(reason="")
2026-08-22 15:52:07.937 7 ERROR nova.conductor.manager 
2026-08-22 15:52:07.937 7 ERROR nova.conductor.manager nova.exception.NoValidHost: No valid host was found. 
2026-08-22 15:52:07.937 7 ERROR nova.conductor.manager 
2026-08-22 15:52:07.937 7 ERROR nova.conductor.manager 
2026-08-22 15:52:08.020 7 WARNING nova.scheduler.utils [None req-c137a7da-cbf4-4d6b-9103-56b6ebd05a7a a4e19ce83e984f0eb37cee928e76ca04 f47dbc4bb57f4cbb9dd3845c3e6874ef - - default default] Failed to compute_task_build_instances: No valid host was found. 
Traceback (most recent call last):

  File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/server.py", line 269, in inner
    return func(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^

  File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/manager.py", line 255, in select_destinations
    raise exception.NoValidHost(reason="")

nova.exception.NoValidHost: No valid host was found. 
: nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-08-22 15:52:08.020 7 WARNING nova.scheduler.utils [None req-c137a7da-cbf4-4d6b-9103-56b6ebd05a7a a4e19ce83e984f0eb37cee928e76ca04 f47dbc4bb57f4cbb9dd3845c3e6874ef - - default default] [instance: e4de4f21-3240-4b68-8297-20d0f0325f9c] Setting instance to ERROR state.: nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-08-22 15:52:39.471 8 ERROR nova.conductor.manager [None req-b9c177d0-93de-44c0-88d4-1a35e5fed7e0 a09f181d4cce423386247caaf946c7cd 28e659c34e0e45b6a30e653d7bfdd201 - - default default] Failed to schedule instances: nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
Traceback (most recent call last):

  File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/server.py", line 269, in inner
    return func(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^

  File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/manager.py", line 255, in select_destinations
    raise exception.NoValidHost(reason="")

nova.exception.NoValidHost: No valid host was found.
2026-08-22 15:52:39.471 8 ERROR nova.conductor.manager Traceback (most recent call last):
2026-08-22 15:52:39.471 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/conductor/manager.py", line 1654, in schedule_and_build_instances
2026-08-22 15:52:39.471 8 ERROR nova.conductor.manager     host_lists = self._schedule_instances(context, request_specs[0],
2026-08-22 15:52:39.471 8 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:52:39.471 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/conductor/manager.py", line 942, in _schedule_instances
2026-08-22 15:52:39.471 8 ERROR nova.conductor.manager     host_lists = self.query_client.select_destinations(
2026-08-22 15:52:39.471 8 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:52:39.471 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/client/query.py", line 41, in select_destinations
2026-08-22 15:52:39.471 8 ERROR nova.conductor.manager     return self.scheduler_rpcapi.select_destinations(context, spec_obj,
2026-08-22 15:52:39.471 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:52:39.471 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/rpcapi.py", line 160, in select_destinations
2026-08-22 15:52:39.471 8 ERROR nova.conductor.manager     return cctxt.call(ctxt, 'select_destinations', **msg_args)
2026-08-22 15:52:39.471 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:52:39.471 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/client.py", line 180, in call
2026-08-22 15:52:39.471 8 ERROR nova.conductor.manager     result = self.transport._send(
2026-08-22 15:52:39.471 8 ERROR nova.conductor.manager              ^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:52:39.471 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/transport.py", line 123, in _send
2026-08-22 15:52:39.471 8 ERROR nova.conductor.manager     return self._driver.send(target, ctxt, message,
2026-08-22 15:52:39.471 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:52:39.471 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 794, in send
2026-08-22 15:52:39.471 8 ERROR nova.conductor.manager     return self._send(target, ctxt, message, wait_for_reply, timeout,
2026-08-22 15:52:39.471 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:52:39.471 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 786, in _send
2026-08-22 15:52:39.471 8 ERROR nova.conductor.manager     raise result
2026-08-22 15:52:39.471 8 ERROR nova.conductor.manager nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-08-22 15:52:39.471 8 ERROR nova.conductor.manager Traceback (most recent call last):
2026-08-22 15:52:39.471 8 ERROR nova.conductor.manager 
2026-08-22 15:52:39.471 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/server.py", line 269, in inner
2026-08-22 15:52:39.471 8 ERROR nova.conductor.manager     return func(*args, **kwargs)
2026-08-22 15:52:39.471 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:52:39.471 8 ERROR nova.conductor.manager 
2026-08-22 15:52:39.471 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/manager.py", line 255, in select_destinations
2026-08-22 15:52:39.471 8 ERROR nova.conductor.manager     raise exception.NoValidHost(reason="")
2026-08-22 15:52:39.471 8 ERROR nova.conductor.manager 
2026-08-22 15:52:39.471 8 ERROR nova.conductor.manager nova.exception.NoValidHost: No valid host was found. 
2026-08-22 15:52:39.471 8 ERROR nova.conductor.manager 
2026-08-22 15:52:39.471 8 ERROR nova.conductor.manager 
2026-08-22 15:52:39.592 8 WARNING nova.scheduler.utils [None req-b9c177d0-93de-44c0-88d4-1a35e5fed7e0 a09f181d4cce423386247caaf946c7cd 28e659c34e0e45b6a30e653d7bfdd201 - - default default] Failed to compute_task_build_instances: No valid host was found. 
Traceback (most recent call last):

  File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/server.py", line 269, in inner
    return func(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^

  File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/manager.py", line 255, in select_destinations
    raise exception.NoValidHost(reason="")

nova.exception.NoValidHost: No valid host was found. 
: nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-08-22 15:52:39.592 8 WARNING nova.scheduler.utils [None req-b9c177d0-93de-44c0-88d4-1a35e5fed7e0 a09f181d4cce423386247caaf946c7cd 28e659c34e0e45b6a30e653d7bfdd201 - - default default] [instance: 307d53cf-7f3b-4f3c-9d6f-841fc08f7b31] Setting instance to ERROR state.: nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-08-22 15:52:39.852 7 ERROR nova.conductor.manager [None req-8531c2bb-1871-4bce-af7d-fe0dc785fbea 6e2e8567a8204fa9942ff58e5c8f49c9 9f5de491341547e4a65b4bf7491224f7 - - default default] Failed to schedule instances: nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
Traceback (most recent call last):

  File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/server.py", line 269, in inner
    return func(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^

  File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/manager.py", line 255, in select_destinations
    raise exception.NoValidHost(reason="")

nova.exception.NoValidHost: No valid host was found.
2026-08-22 15:52:39.852 7 ERROR nova.conductor.manager Traceback (most recent call last):
2026-08-22 15:52:39.852 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/conductor/manager.py", line 1654, in schedule_and_build_instances
2026-08-22 15:52:39.852 7 ERROR nova.conductor.manager     host_lists = self._schedule_instances(context, request_specs[0],
2026-08-22 15:52:39.852 7 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:52:39.852 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/conductor/manager.py", line 942, in _schedule_instances
2026-08-22 15:52:39.852 7 ERROR nova.conductor.manager     host_lists = self.query_client.select_destinations(
2026-08-22 15:52:39.852 7 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:52:39.852 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/client/query.py", line 41, in select_destinations
2026-08-22 15:52:39.852 7 ERROR nova.conductor.manager     return self.scheduler_rpcapi.select_destinations(context, spec_obj,
2026-08-22 15:52:39.852 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:52:39.852 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/rpcapi.py", line 160, in select_destinations
2026-08-22 15:52:39.852 7 ERROR nova.conductor.manager     return cctxt.call(ctxt, 'select_destinations', **msg_args)
2026-08-22 15:52:39.852 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:52:39.852 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/client.py", line 180, in call
2026-08-22 15:52:39.852 7 ERROR nova.conductor.manager     result = self.transport._send(
2026-08-22 15:52:39.852 7 ERROR nova.conductor.manager              ^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:52:39.852 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/transport.py", line 123, in _send
2026-08-22 15:52:39.852 7 ERROR nova.conductor.manager     return self._driver.send(target, ctxt, message,
2026-08-22 15:52:39.852 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:52:39.852 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 794, in send
2026-08-22 15:52:39.852 7 ERROR nova.conductor.manager     return self._send(target, ctxt, message, wait_for_reply, timeout,
2026-08-22 15:52:39.852 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:52:39.852 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 786, in _send
2026-08-22 15:52:39.852 7 ERROR nova.conductor.manager     raise result
2026-08-22 15:52:39.852 7 ERROR nova.conductor.manager nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-08-22 15:52:39.852 7 ERROR nova.conductor.manager Traceback (most recent call last):
2026-08-22 15:52:39.852 7 ERROR nova.conductor.manager 
2026-08-22 15:52:39.852 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/server.py", line 269, in inner
2026-08-22 15:52:39.852 7 ERROR nova.conductor.manager     return func(*args, **kwargs)
2026-08-22 15:52:39.852 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^
2026-08-22 15:52:39.852 7 ERROR nova.conductor.manager 
2026-08-22 15:52:39.852 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/manager.py", line 255, in select_destinations
2026-08-22 15:52:39.852 7 ERROR nova.conductor.manager     raise exception.NoValidHost(reason="")
2026-08-22 15:52:39.852 7 ERROR nova.conductor.manager 
2026-08-22 15:52:39.852 7 ERROR nova.conductor.manager nova.exception.NoValidHost: No valid host was found. 
2026-08-22 15:52:39.852 7 ERROR nova.conductor.manager 
2026-08-22 15:52:39.852 7 ERROR nova.conductor.manager 
2026-08-22 15:52:39.971 7 WARNING nova.scheduler.utils [None req-8531c2bb-1871-4bce-af7d-fe0dc785fbea 6e2e8567a8204fa9942ff58e5c8f49c9 9f5de491341547e4a65b4bf7491224f7 - - default default] Failed to compute_task_build_instances: No valid host was found. 
Traceback (most recent call last):

  File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/server.py", line 269, in inner
    return func(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^

  File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/manager.py", line 255, in select_destinations
    raise exception.NoValidHost(reason="")

nova.exception.NoValidHost: No valid host was found. 
: nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-08-22 15:52:39.972 7 WARNING nova.scheduler.utils [None req-8531c2bb-1871-4bce-af7d-fe0dc785fbea 6e2e8567a8204fa9942ff58e5c8f49c9 9f5de491341547e4a65b4bf7491224f7 - - default default] [instance: d3db33d0-f4a2-4f86-85c0-ac3428a28a92] Setting instance to ERROR state.: nova.exception_Remote.NoValidHost_Remote: No valid host was found.