+ exec nova-conductor --config-file /etc/nova/nova.conf
2026-08-21 03:06:56.990 1 INFO oslo_service.backend.eventlet.service [None req-51a86ef1-f11c-4e8a-aee4-f88259d34290 - - - - - -] Starting 2 workers
2026-08-21 03:06:56.999 7 INFO nova.service [-] Starting conductor node (version 31.3.2)
2026-08-21 03:06:57.000 8 INFO nova.service [-] Starting conductor node (version 31.3.2)
2026-08-21 03:06:57.003 1 WARNING oslo_config.cfg [None req-51a86ef1-f11c-4e8a-aee4-f88259d34290 - - - - - -] 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.
2026-08-21 03:46:42.918 7 ERROR nova.conductor.manager [None req-7457d141-c3af-40e0-a40b-f343feaba84a b42ad9e043b04c30a8017a7f589b4ce0 e1ad094dcfb349d1991e6c86a7f57a68 - - 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.
2026-08-21 03:46:42.918 7 ERROR nova.conductor.manager Traceback (most recent call last):
2026-08-21 03:46:42.918 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
2026-08-21 03:46:42.918 7 ERROR nova.conductor.manager     host_lists = self._schedule_instances(context, request_specs[0],
2026-08-21 03:46:42.918 7 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:46:42.918 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/conductor/manager.py", line 942, in _schedule_instances
2026-08-21 03:46:42.918 7 ERROR nova.conductor.manager     host_lists = self.query_client.select_destinations(
2026-08-21 03:46:42.918 7 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:46:42.918 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/client/query.py", line 41, in select_destinations
2026-08-21 03:46:42.918 7 ERROR nova.conductor.manager     return self.scheduler_rpcapi.select_destinations(context, spec_obj,
2026-08-21 03:46:42.918 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:46:42.918 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/rpcapi.py", line 160, in select_destinations
2026-08-21 03:46:42.918 7 ERROR nova.conductor.manager     return cctxt.call(ctxt, 'select_destinations', **msg_args)
2026-08-21 03:46:42.918 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:46:42.918 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/client.py", line 190, in call
2026-08-21 03:46:42.918 7 ERROR nova.conductor.manager     result = self.transport._send(
2026-08-21 03:46:42.918 7 ERROR nova.conductor.manager              ^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:46:42.918 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/transport.py", line 123, in _send
2026-08-21 03:46:42.918 7 ERROR nova.conductor.manager     return self._driver.send(target, ctxt, message,
2026-08-21 03:46:42.918 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:46:42.918 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 806, in send
2026-08-21 03:46:42.918 7 ERROR nova.conductor.manager     return self._send(target, ctxt, message, wait_for_reply, timeout,
2026-08-21 03:46:42.918 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:46:42.918 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 798, in _send
2026-08-21 03:46:42.918 7 ERROR nova.conductor.manager     raise result
2026-08-21 03:46:42.918 7 ERROR nova.conductor.manager nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-08-21 03:46:42.918 7 ERROR nova.conductor.manager Traceback (most recent call last):
2026-08-21 03:46:42.918 7 ERROR nova.conductor.manager 
2026-08-21 03:46:42.918 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/server.py", line 269, in inner
2026-08-21 03:46:42.918 7 ERROR nova.conductor.manager     return func(*args, **kwargs)
2026-08-21 03:46:42.918 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:46:42.918 7 ERROR nova.conductor.manager 
2026-08-21 03:46:42.918 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/manager.py", line 255, in select_destinations
2026-08-21 03:46:42.918 7 ERROR nova.conductor.manager     raise exception.NoValidHost(reason="")
2026-08-21 03:46:42.918 7 ERROR nova.conductor.manager 
2026-08-21 03:46:42.918 7 ERROR nova.conductor.manager nova.exception.NoValidHost: No valid host was found. 
2026-08-21 03:46:42.918 7 ERROR nova.conductor.manager 
2026-08-21 03:46:42.918 7 ERROR nova.conductor.manager 
2026-08-21 03:46:43.197 7 WARNING nova.scheduler.utils [None req-7457d141-c3af-40e0-a40b-f343feaba84a b42ad9e043b04c30a8017a7f589b4ce0 e1ad094dcfb349d1991e6c86a7f57a68 - - 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. 
2026-08-21 03:46:43.200 8 ERROR nova.conductor.manager [None req-1520785f-f8fa-42b1-b8ba-3043410a08fe b82ef9268a9b4675959ae0635a0d103d bb796b4dc8fd48b896ab19318dee1c75 - - 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.
2026-08-21 03:46:43.200 8 ERROR nova.conductor.manager Traceback (most recent call last):
2026-08-21 03:46:43.200 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
2026-08-21 03:46:43.200 8 ERROR nova.conductor.manager     host_lists = self._schedule_instances(context, request_specs[0],
2026-08-21 03:46:43.200 8 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:46:43.200 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/conductor/manager.py", line 942, in _schedule_instances
2026-08-21 03:46:43.200 8 ERROR nova.conductor.manager     host_lists = self.query_client.select_destinations(
2026-08-21 03:46:43.200 8 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:46:43.200 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/client/query.py", line 41, in select_destinations
2026-08-21 03:46:43.200 8 ERROR nova.conductor.manager     return self.scheduler_rpcapi.select_destinations(context, spec_obj,
2026-08-21 03:46:43.200 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:46:43.200 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/rpcapi.py", line 160, in select_destinations
2026-08-21 03:46:43.200 8 ERROR nova.conductor.manager     return cctxt.call(ctxt, 'select_destinations', **msg_args)
2026-08-21 03:46:43.200 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:46:43.200 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/client.py", line 190, in call
2026-08-21 03:46:43.200 8 ERROR nova.conductor.manager     result = self.transport._send(
2026-08-21 03:46:43.200 8 ERROR nova.conductor.manager              ^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:46:43.200 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/transport.py", line 123, in _send
2026-08-21 03:46:43.200 8 ERROR nova.conductor.manager     return self._driver.send(target, ctxt, message,
2026-08-21 03:46:43.200 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:46:43.200 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 806, in send
2026-08-21 03:46:43.200 8 ERROR nova.conductor.manager     return self._send(target, ctxt, message, wait_for_reply, timeout,
2026-08-21 03:46:43.200 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:46:43.200 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 798, in _send
2026-08-21 03:46:43.200 8 ERROR nova.conductor.manager     raise result
2026-08-21 03:46:43.200 8 ERROR nova.conductor.manager nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-08-21 03:46:43.200 8 ERROR nova.conductor.manager Traceback (most recent call last):
2026-08-21 03:46:43.200 8 ERROR nova.conductor.manager 
2026-08-21 03:46:43.200 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/server.py", line 269, in inner
2026-08-21 03:46:43.200 8 ERROR nova.conductor.manager     return func(*args, **kwargs)
2026-08-21 03:46:43.200 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:46:43.200 8 ERROR nova.conductor.manager 
2026-08-21 03:46:43.200 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/manager.py", line 255, in select_destinations
2026-08-21 03:46:43.200 8 ERROR nova.conductor.manager     raise exception.NoValidHost(reason="")
2026-08-21 03:46:43.200 8 ERROR nova.conductor.manager 
2026-08-21 03:46:43.200 8 ERROR nova.conductor.manager nova.exception.NoValidHost: No valid host was found. 
2026-08-21 03:46:43.200 8 ERROR nova.conductor.manager 
2026-08-21 03:46:43.200 8 ERROR nova.conductor.manager 
2026-08-21 03:46:43.202 7 WARNING nova.scheduler.utils [None req-7457d141-c3af-40e0-a40b-f343feaba84a b42ad9e043b04c30a8017a7f589b4ce0 e1ad094dcfb349d1991e6c86a7f57a68 - - default default] [instance: 4388e5cd-4abb-4bfe-9286-fc4866e0c185] Setting instance to ERROR state.: nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-08-21 03:46:43.246 7 WARNING oslo_config.cfg [None req-7457d141-c3af-40e0-a40b-f343feaba84a b42ad9e043b04c30a8017a7f589b4ce0 e1ad094dcfb349d1991e6c86a7f57a68 - - 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. 
2026-08-21 03:46:43.405 8 WARNING nova.scheduler.utils [None req-1520785f-f8fa-42b1-b8ba-3043410a08fe b82ef9268a9b4675959ae0635a0d103d bb796b4dc8fd48b896ab19318dee1c75 - - 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. 
2026-08-21 03:46:43.407 8 WARNING nova.scheduler.utils [None req-1520785f-f8fa-42b1-b8ba-3043410a08fe b82ef9268a9b4675959ae0635a0d103d bb796b4dc8fd48b896ab19318dee1c75 - - default default] [instance: 552f0524-2ed0-4764-9c0b-c5e9fe85413c] Setting instance to ERROR state.: nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-08-21 03:46:43.450 8 WARNING oslo_config.cfg [None req-1520785f-f8fa-42b1-b8ba-3043410a08fe b82ef9268a9b4675959ae0635a0d103d bb796b4dc8fd48b896ab19318dee1c75 - - 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. 
2026-08-21 03:46:59.545 8 ERROR nova.conductor.manager [None req-0c77a8bf-e580-4d2e-a436-103c1525427f 9f3ce2b8faa34915b8b15dc906c472ae 659cf65bda56469181a83ad59b5d4087 - - 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.
2026-08-21 03:46:59.545 8 ERROR nova.conductor.manager Traceback (most recent call last):
2026-08-21 03:46:59.545 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
2026-08-21 03:46:59.545 8 ERROR nova.conductor.manager     host_lists = self._schedule_instances(context, request_specs[0],
2026-08-21 03:46:59.545 8 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:46:59.545 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/conductor/manager.py", line 942, in _schedule_instances
2026-08-21 03:46:59.545 8 ERROR nova.conductor.manager     host_lists = self.query_client.select_destinations(
2026-08-21 03:46:59.545 8 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:46:59.545 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/client/query.py", line 41, in select_destinations
2026-08-21 03:46:59.545 8 ERROR nova.conductor.manager     return self.scheduler_rpcapi.select_destinations(context, spec_obj,
2026-08-21 03:46:59.545 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:46:59.545 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/rpcapi.py", line 160, in select_destinations
2026-08-21 03:46:59.545 8 ERROR nova.conductor.manager     return cctxt.call(ctxt, 'select_destinations', **msg_args)
2026-08-21 03:46:59.545 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:46:59.545 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/client.py", line 190, in call
2026-08-21 03:46:59.545 8 ERROR nova.conductor.manager     result = self.transport._send(
2026-08-21 03:46:59.545 8 ERROR nova.conductor.manager              ^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:46:59.545 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/transport.py", line 123, in _send
2026-08-21 03:46:59.545 8 ERROR nova.conductor.manager     return self._driver.send(target, ctxt, message,
2026-08-21 03:46:59.545 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:46:59.545 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 806, in send
2026-08-21 03:46:59.545 8 ERROR nova.conductor.manager     return self._send(target, ctxt, message, wait_for_reply, timeout,
2026-08-21 03:46:59.545 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:46:59.545 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 798, in _send
2026-08-21 03:46:59.545 8 ERROR nova.conductor.manager     raise result
2026-08-21 03:46:59.545 8 ERROR nova.conductor.manager nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-08-21 03:46:59.545 8 ERROR nova.conductor.manager Traceback (most recent call last):
2026-08-21 03:46:59.545 8 ERROR nova.conductor.manager 
2026-08-21 03:46:59.545 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/server.py", line 269, in inner
2026-08-21 03:46:59.545 8 ERROR nova.conductor.manager     return func(*args, **kwargs)
2026-08-21 03:46:59.545 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:46:59.545 8 ERROR nova.conductor.manager 
2026-08-21 03:46:59.545 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/manager.py", line 255, in select_destinations
2026-08-21 03:46:59.545 8 ERROR nova.conductor.manager     raise exception.NoValidHost(reason="")
2026-08-21 03:46:59.545 8 ERROR nova.conductor.manager 
2026-08-21 03:46:59.545 8 ERROR nova.conductor.manager nova.exception.NoValidHost: No valid host was found. 
2026-08-21 03:46:59.545 8 ERROR nova.conductor.manager 
2026-08-21 03:46:59.545 8 ERROR nova.conductor.manager 
2026-08-21 03:46:59.654 8 WARNING nova.scheduler.utils [None req-0c77a8bf-e580-4d2e-a436-103c1525427f 9f3ce2b8faa34915b8b15dc906c472ae 659cf65bda56469181a83ad59b5d4087 - - 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. 
2026-08-21 03:46:59.655 8 WARNING nova.scheduler.utils [None req-0c77a8bf-e580-4d2e-a436-103c1525427f 9f3ce2b8faa34915b8b15dc906c472ae 659cf65bda56469181a83ad59b5d4087 - - default default] [instance: f911a50d-ccf5-4b6c-a049-dc921f925220] Setting instance to ERROR state.: nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-08-21 03:47:06.989 7 ERROR nova.conductor.manager [None req-72be6e89-d99c-47c7-aae7-a42f48bacf2e 1a858383538f473f9bbb023a0c4f4cf7 a97c13833ea1419a85f7a3537db84b18 - - 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.
2026-08-21 03:47:06.989 7 ERROR nova.conductor.manager Traceback (most recent call last):
2026-08-21 03:47:06.989 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
2026-08-21 03:47:06.989 7 ERROR nova.conductor.manager     host_lists = self._schedule_instances(context, request_specs[0],
2026-08-21 03:47:06.989 7 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:47:06.989 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/conductor/manager.py", line 942, in _schedule_instances
2026-08-21 03:47:06.989 7 ERROR nova.conductor.manager     host_lists = self.query_client.select_destinations(
2026-08-21 03:47:06.989 7 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:47:06.989 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/client/query.py", line 41, in select_destinations
2026-08-21 03:47:06.989 7 ERROR nova.conductor.manager     return self.scheduler_rpcapi.select_destinations(context, spec_obj,
2026-08-21 03:47:06.989 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:47:06.989 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/rpcapi.py", line 160, in select_destinations
2026-08-21 03:47:06.989 7 ERROR nova.conductor.manager     return cctxt.call(ctxt, 'select_destinations', **msg_args)
2026-08-21 03:47:06.989 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:47:06.989 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/client.py", line 190, in call
2026-08-21 03:47:06.989 7 ERROR nova.conductor.manager     result = self.transport._send(
2026-08-21 03:47:06.989 7 ERROR nova.conductor.manager              ^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:47:06.989 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/transport.py", line 123, in _send
2026-08-21 03:47:06.989 7 ERROR nova.conductor.manager     return self._driver.send(target, ctxt, message,
2026-08-21 03:47:06.989 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:47:06.989 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 806, in send
2026-08-21 03:47:06.989 7 ERROR nova.conductor.manager     return self._send(target, ctxt, message, wait_for_reply, timeout,
2026-08-21 03:47:06.989 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:47:06.989 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 798, in _send
2026-08-21 03:47:06.989 7 ERROR nova.conductor.manager     raise result
2026-08-21 03:47:06.989 7 ERROR nova.conductor.manager nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-08-21 03:47:06.989 7 ERROR nova.conductor.manager Traceback (most recent call last):
2026-08-21 03:47:06.989 7 ERROR nova.conductor.manager 
2026-08-21 03:47:06.989 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/server.py", line 269, in inner
2026-08-21 03:47:06.989 7 ERROR nova.conductor.manager     return func(*args, **kwargs)
2026-08-21 03:47:06.989 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:47:06.989 7 ERROR nova.conductor.manager 
2026-08-21 03:47:06.989 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/manager.py", line 255, in select_destinations
2026-08-21 03:47:06.989 7 ERROR nova.conductor.manager     raise exception.NoValidHost(reason="")
2026-08-21 03:47:06.989 7 ERROR nova.conductor.manager 
2026-08-21 03:47:06.989 7 ERROR nova.conductor.manager nova.exception.NoValidHost: No valid host was found. 
2026-08-21 03:47:06.989 7 ERROR nova.conductor.manager 
2026-08-21 03:47:06.989 7 ERROR nova.conductor.manager 
2026-08-21 03:47:07.227 7 WARNING nova.scheduler.utils [None req-72be6e89-d99c-47c7-aae7-a42f48bacf2e 1a858383538f473f9bbb023a0c4f4cf7 a97c13833ea1419a85f7a3537db84b18 - - 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. 
2026-08-21 03:47:07.228 7 WARNING nova.scheduler.utils [None req-72be6e89-d99c-47c7-aae7-a42f48bacf2e 1a858383538f473f9bbb023a0c4f4cf7 a97c13833ea1419a85f7a3537db84b18 - - default default] [instance: 4550192f-c1f9-469e-ba7e-b8b22abde352] Setting instance to ERROR state.: nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-08-21 03:47:14.932 8 ERROR nova.conductor.manager [None req-7ba247a3-a152-41fd-b74a-4c076a35243e 1d31562165f648189d4be2ab7aea70df 6f9413c609354031b73d7b46f322d39e - - 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.
2026-08-21 03:47:14.932 8 ERROR nova.conductor.manager Traceback (most recent call last):
2026-08-21 03:47:14.932 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
2026-08-21 03:47:14.932 8 ERROR nova.conductor.manager     host_lists = self._schedule_instances(context, request_specs[0],
2026-08-21 03:47:14.932 8 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:47:14.932 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/conductor/manager.py", line 942, in _schedule_instances
2026-08-21 03:47:14.932 8 ERROR nova.conductor.manager     host_lists = self.query_client.select_destinations(
2026-08-21 03:47:14.932 8 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:47:14.932 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/client/query.py", line 41, in select_destinations
2026-08-21 03:47:14.932 8 ERROR nova.conductor.manager     return self.scheduler_rpcapi.select_destinations(context, spec_obj,
2026-08-21 03:47:14.932 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:47:14.932 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/rpcapi.py", line 160, in select_destinations
2026-08-21 03:47:14.932 8 ERROR nova.conductor.manager     return cctxt.call(ctxt, 'select_destinations', **msg_args)
2026-08-21 03:47:14.932 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:47:14.932 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/client.py", line 190, in call
2026-08-21 03:47:14.932 8 ERROR nova.conductor.manager     result = self.transport._send(
2026-08-21 03:47:14.932 8 ERROR nova.conductor.manager              ^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:47:14.932 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/transport.py", line 123, in _send
2026-08-21 03:47:14.932 8 ERROR nova.conductor.manager     return self._driver.send(target, ctxt, message,
2026-08-21 03:47:14.932 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:47:14.932 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 806, in send
2026-08-21 03:47:14.932 8 ERROR nova.conductor.manager     return self._send(target, ctxt, message, wait_for_reply, timeout,
2026-08-21 03:47:14.932 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:47:14.932 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 798, in _send
2026-08-21 03:47:14.932 8 ERROR nova.conductor.manager     raise result
2026-08-21 03:47:14.932 8 ERROR nova.conductor.manager nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-08-21 03:47:14.932 8 ERROR nova.conductor.manager Traceback (most recent call last):
2026-08-21 03:47:14.932 8 ERROR nova.conductor.manager 
2026-08-21 03:47:14.932 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/server.py", line 269, in inner
2026-08-21 03:47:14.932 8 ERROR nova.conductor.manager     return func(*args, **kwargs)
2026-08-21 03:47:14.932 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:47:14.932 8 ERROR nova.conductor.manager 
2026-08-21 03:47:14.932 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/manager.py", line 255, in select_destinations
2026-08-21 03:47:14.932 8 ERROR nova.conductor.manager     raise exception.NoValidHost(reason="")
2026-08-21 03:47:14.932 8 ERROR nova.conductor.manager 
2026-08-21 03:47:14.932 8 ERROR nova.conductor.manager nova.exception.NoValidHost: No valid host was found. 
2026-08-21 03:47:14.932 8 ERROR nova.conductor.manager 
2026-08-21 03:47:14.932 8 ERROR nova.conductor.manager 
2026-08-21 03:47:15.091 8 WARNING nova.scheduler.utils [None req-7ba247a3-a152-41fd-b74a-4c076a35243e 1d31562165f648189d4be2ab7aea70df 6f9413c609354031b73d7b46f322d39e - - 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. 
2026-08-21 03:47:15.092 8 WARNING nova.scheduler.utils [None req-7ba247a3-a152-41fd-b74a-4c076a35243e 1d31562165f648189d4be2ab7aea70df 6f9413c609354031b73d7b46f322d39e - - default default] [instance: 339fe5d9-badf-4913-8bb5-e3c2bb43bd7a] Setting instance to ERROR state.: nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-08-21 03:47:30.115 7 ERROR nova.conductor.manager [None req-61abbc3b-e59d-4847-b404-819df9833d6b b9dfb75635e24300ac91dcf474e12775 4c34b732a3b747629295a885668298f3 - - 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.
2026-08-21 03:47:30.115 7 ERROR nova.conductor.manager Traceback (most recent call last):
2026-08-21 03:47:30.115 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
2026-08-21 03:47:30.115 7 ERROR nova.conductor.manager     host_lists = self._schedule_instances(context, request_specs[0],
2026-08-21 03:47:30.115 7 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:47:30.115 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/conductor/manager.py", line 942, in _schedule_instances
2026-08-21 03:47:30.115 7 ERROR nova.conductor.manager     host_lists = self.query_client.select_destinations(
2026-08-21 03:47:30.115 7 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:47:30.115 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/client/query.py", line 41, in select_destinations
2026-08-21 03:47:30.115 7 ERROR nova.conductor.manager     return self.scheduler_rpcapi.select_destinations(context, spec_obj,
2026-08-21 03:47:30.115 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:47:30.115 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/rpcapi.py", line 160, in select_destinations
2026-08-21 03:47:30.115 7 ERROR nova.conductor.manager     return cctxt.call(ctxt, 'select_destinations', **msg_args)
2026-08-21 03:47:30.115 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:47:30.115 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/client.py", line 190, in call
2026-08-21 03:47:30.115 7 ERROR nova.conductor.manager     result = self.transport._send(
2026-08-21 03:47:30.115 7 ERROR nova.conductor.manager              ^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:47:30.115 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/transport.py", line 123, in _send
2026-08-21 03:47:30.115 7 ERROR nova.conductor.manager     return self._driver.send(target, ctxt, message,
2026-08-21 03:47:30.115 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:47:30.115 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 806, in send
2026-08-21 03:47:30.115 7 ERROR nova.conductor.manager     return self._send(target, ctxt, message, wait_for_reply, timeout,
2026-08-21 03:47:30.115 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:47:30.115 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 798, in _send
2026-08-21 03:47:30.115 7 ERROR nova.conductor.manager     raise result
2026-08-21 03:47:30.115 7 ERROR nova.conductor.manager nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-08-21 03:47:30.115 7 ERROR nova.conductor.manager Traceback (most recent call last):
2026-08-21 03:47:30.115 7 ERROR nova.conductor.manager 
2026-08-21 03:47:30.115 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/server.py", line 269, in inner
2026-08-21 03:47:30.115 7 ERROR nova.conductor.manager     return func(*args, **kwargs)
2026-08-21 03:47:30.115 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:47:30.115 7 ERROR nova.conductor.manager 
2026-08-21 03:47:30.115 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/manager.py", line 255, in select_destinations
2026-08-21 03:47:30.115 7 ERROR nova.conductor.manager     raise exception.NoValidHost(reason="")
2026-08-21 03:47:30.115 7 ERROR nova.conductor.manager 
2026-08-21 03:47:30.115 7 ERROR nova.conductor.manager nova.exception.NoValidHost: No valid host was found. 
2026-08-21 03:47:30.115 7 ERROR nova.conductor.manager 
2026-08-21 03:47:30.115 7 ERROR nova.conductor.manager 
2026-08-21 03:47:30.221 7 WARNING nova.scheduler.utils [None req-61abbc3b-e59d-4847-b404-819df9833d6b b9dfb75635e24300ac91dcf474e12775 4c34b732a3b747629295a885668298f3 - - 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. 
2026-08-21 03:47:30.222 7 WARNING nova.scheduler.utils [None req-61abbc3b-e59d-4847-b404-819df9833d6b b9dfb75635e24300ac91dcf474e12775 4c34b732a3b747629295a885668298f3 - - default default] [instance: 846ec2aa-028b-470e-a968-4eabc103cb82] Setting instance to ERROR state.: nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-08-21 03:48:30.723 8 ERROR nova.conductor.manager [None req-adc0735c-e8bd-478a-81d2-123c775e979b d159ab4dd0a745e9b48e495209353311 8be8be8884804ebab8a47b883df4d6f2 - - 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.
2026-08-21 03:48:30.723 8 ERROR nova.conductor.manager Traceback (most recent call last):
2026-08-21 03:48:30.723 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
2026-08-21 03:48:30.723 8 ERROR nova.conductor.manager     host_lists = self._schedule_instances(context, request_specs[0],
2026-08-21 03:48:30.723 8 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:48:30.723 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/conductor/manager.py", line 942, in _schedule_instances
2026-08-21 03:48:30.723 8 ERROR nova.conductor.manager     host_lists = self.query_client.select_destinations(
2026-08-21 03:48:30.723 8 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:48:30.723 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/client/query.py", line 41, in select_destinations
2026-08-21 03:48:30.723 8 ERROR nova.conductor.manager     return self.scheduler_rpcapi.select_destinations(context, spec_obj,
2026-08-21 03:48:30.723 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:48:30.723 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/rpcapi.py", line 160, in select_destinations
2026-08-21 03:48:30.723 8 ERROR nova.conductor.manager     return cctxt.call(ctxt, 'select_destinations', **msg_args)
2026-08-21 03:48:30.723 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:48:30.723 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/client.py", line 190, in call
2026-08-21 03:48:30.723 8 ERROR nova.conductor.manager     result = self.transport._send(
2026-08-21 03:48:30.723 8 ERROR nova.conductor.manager              ^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:48:30.723 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/transport.py", line 123, in _send
2026-08-21 03:48:30.723 8 ERROR nova.conductor.manager     return self._driver.send(target, ctxt, message,
2026-08-21 03:48:30.723 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:48:30.723 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 806, in send
2026-08-21 03:48:30.723 8 ERROR nova.conductor.manager     return self._send(target, ctxt, message, wait_for_reply, timeout,
2026-08-21 03:48:30.723 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:48:30.723 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 798, in _send
2026-08-21 03:48:30.723 8 ERROR nova.conductor.manager     raise result
2026-08-21 03:48:30.723 8 ERROR nova.conductor.manager nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-08-21 03:48:30.723 8 ERROR nova.conductor.manager Traceback (most recent call last):
2026-08-21 03:48:30.723 8 ERROR nova.conductor.manager 
2026-08-21 03:48:30.723 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/server.py", line 269, in inner
2026-08-21 03:48:30.723 8 ERROR nova.conductor.manager     return func(*args, **kwargs)
2026-08-21 03:48:30.723 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:48:30.723 8 ERROR nova.conductor.manager 
2026-08-21 03:48:30.723 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/manager.py", line 255, in select_destinations
2026-08-21 03:48:30.723 8 ERROR nova.conductor.manager     raise exception.NoValidHost(reason="")
2026-08-21 03:48:30.723 8 ERROR nova.conductor.manager 
2026-08-21 03:48:30.723 8 ERROR nova.conductor.manager nova.exception.NoValidHost: No valid host was found. 
2026-08-21 03:48:30.723 8 ERROR nova.conductor.manager 
2026-08-21 03:48:30.723 8 ERROR nova.conductor.manager 
2026-08-21 03:48:30.825 8 WARNING nova.scheduler.utils [None req-adc0735c-e8bd-478a-81d2-123c775e979b d159ab4dd0a745e9b48e495209353311 8be8be8884804ebab8a47b883df4d6f2 - - 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. 
2026-08-21 03:48:30.827 8 WARNING nova.scheduler.utils [None req-adc0735c-e8bd-478a-81d2-123c775e979b d159ab4dd0a745e9b48e495209353311 8be8be8884804ebab8a47b883df4d6f2 - - default default] [instance: 06aa35f2-5b7a-44a2-b0d8-e19a887bbd6e] Setting instance to ERROR state.: nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-08-21 03:49:07.820 7 ERROR nova.conductor.manager [None req-2f92e328-1126-466c-be57-81057b6d62ba 07219dcd488b4ec89476971d346fd288 e83acf2d5b5e47169ebe5e55762e78d3 - - 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.
2026-08-21 03:49:07.820 7 ERROR nova.conductor.manager Traceback (most recent call last):
2026-08-21 03:49:07.820 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
2026-08-21 03:49:07.820 7 ERROR nova.conductor.manager     host_lists = self._schedule_instances(context, request_specs[0],
2026-08-21 03:49:07.820 7 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:49:07.820 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/conductor/manager.py", line 942, in _schedule_instances
2026-08-21 03:49:07.820 7 ERROR nova.conductor.manager     host_lists = self.query_client.select_destinations(
2026-08-21 03:49:07.820 7 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:49:07.820 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/client/query.py", line 41, in select_destinations
2026-08-21 03:49:07.820 7 ERROR nova.conductor.manager     return self.scheduler_rpcapi.select_destinations(context, spec_obj,
2026-08-21 03:49:07.820 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:49:07.820 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/rpcapi.py", line 160, in select_destinations
2026-08-21 03:49:07.820 7 ERROR nova.conductor.manager     return cctxt.call(ctxt, 'select_destinations', **msg_args)
2026-08-21 03:49:07.820 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:49:07.820 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/client.py", line 190, in call
2026-08-21 03:49:07.820 7 ERROR nova.conductor.manager     result = self.transport._send(
2026-08-21 03:49:07.820 7 ERROR nova.conductor.manager              ^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:49:07.820 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/transport.py", line 123, in _send
2026-08-21 03:49:07.820 7 ERROR nova.conductor.manager     return self._driver.send(target, ctxt, message,
2026-08-21 03:49:07.820 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:49:07.820 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 806, in send
2026-08-21 03:49:07.820 7 ERROR nova.conductor.manager     return self._send(target, ctxt, message, wait_for_reply, timeout,
2026-08-21 03:49:07.820 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:49:07.820 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 798, in _send
2026-08-21 03:49:07.820 7 ERROR nova.conductor.manager     raise result
2026-08-21 03:49:07.820 7 ERROR nova.conductor.manager nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-08-21 03:49:07.820 7 ERROR nova.conductor.manager Traceback (most recent call last):
2026-08-21 03:49:07.820 7 ERROR nova.conductor.manager 
2026-08-21 03:49:07.820 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/server.py", line 269, in inner
2026-08-21 03:49:07.820 7 ERROR nova.conductor.manager     return func(*args, **kwargs)
2026-08-21 03:49:07.820 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:49:07.820 7 ERROR nova.conductor.manager 
2026-08-21 03:49:07.820 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/manager.py", line 255, in select_destinations
2026-08-21 03:49:07.820 7 ERROR nova.conductor.manager     raise exception.NoValidHost(reason="")
2026-08-21 03:49:07.820 7 ERROR nova.conductor.manager 
2026-08-21 03:49:07.820 7 ERROR nova.conductor.manager nova.exception.NoValidHost: No valid host was found. 
2026-08-21 03:49:07.820 7 ERROR nova.conductor.manager 
2026-08-21 03:49:07.820 7 ERROR nova.conductor.manager 
2026-08-21 03:49:08.648 7 WARNING nova.scheduler.utils [None req-2f92e328-1126-466c-be57-81057b6d62ba 07219dcd488b4ec89476971d346fd288 e83acf2d5b5e47169ebe5e55762e78d3 - - 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. 
2026-08-21 03:49:08.649 7 WARNING nova.scheduler.utils [None req-2f92e328-1126-466c-be57-81057b6d62ba 07219dcd488b4ec89476971d346fd288 e83acf2d5b5e47169ebe5e55762e78d3 - - default default] [instance: a33e4c6a-be39-4734-8f41-54ff84b171f0] Setting instance to ERROR state.: nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-08-21 03:49:42.059 8 ERROR nova.conductor.manager [None req-c0e63710-6c76-499f-a519-74209450bb2e aa13c3aa229544ac8802d665892a821d fd9bb05c39504489b864f92298c37d61 - - 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.
2026-08-21 03:49:42.059 8 ERROR nova.conductor.manager Traceback (most recent call last):
2026-08-21 03:49:42.059 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
2026-08-21 03:49:42.059 8 ERROR nova.conductor.manager     host_lists = self._schedule_instances(context, request_specs[0],
2026-08-21 03:49:42.059 8 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:49:42.059 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/conductor/manager.py", line 942, in _schedule_instances
2026-08-21 03:49:42.059 8 ERROR nova.conductor.manager     host_lists = self.query_client.select_destinations(
2026-08-21 03:49:42.059 8 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:49:42.059 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/client/query.py", line 41, in select_destinations
2026-08-21 03:49:42.059 8 ERROR nova.conductor.manager     return self.scheduler_rpcapi.select_destinations(context, spec_obj,
2026-08-21 03:49:42.059 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:49:42.059 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/rpcapi.py", line 160, in select_destinations
2026-08-21 03:49:42.059 8 ERROR nova.conductor.manager     return cctxt.call(ctxt, 'select_destinations', **msg_args)
2026-08-21 03:49:42.059 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:49:42.059 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/client.py", line 190, in call
2026-08-21 03:49:42.059 8 ERROR nova.conductor.manager     result = self.transport._send(
2026-08-21 03:49:42.059 8 ERROR nova.conductor.manager              ^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:49:42.059 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/transport.py", line 123, in _send
2026-08-21 03:49:42.059 8 ERROR nova.conductor.manager     return self._driver.send(target, ctxt, message,
2026-08-21 03:49:42.059 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:49:42.059 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 806, in send
2026-08-21 03:49:42.059 8 ERROR nova.conductor.manager     return self._send(target, ctxt, message, wait_for_reply, timeout,
2026-08-21 03:49:42.059 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:49:42.059 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 798, in _send
2026-08-21 03:49:42.059 8 ERROR nova.conductor.manager     raise result
2026-08-21 03:49:42.059 8 ERROR nova.conductor.manager nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-08-21 03:49:42.059 8 ERROR nova.conductor.manager Traceback (most recent call last):
2026-08-21 03:49:42.059 8 ERROR nova.conductor.manager 
2026-08-21 03:49:42.059 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/server.py", line 269, in inner
2026-08-21 03:49:42.059 8 ERROR nova.conductor.manager     return func(*args, **kwargs)
2026-08-21 03:49:42.059 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:49:42.059 8 ERROR nova.conductor.manager 
2026-08-21 03:49:42.059 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/manager.py", line 255, in select_destinations
2026-08-21 03:49:42.059 8 ERROR nova.conductor.manager     raise exception.NoValidHost(reason="")
2026-08-21 03:49:42.059 8 ERROR nova.conductor.manager 
2026-08-21 03:49:42.059 8 ERROR nova.conductor.manager nova.exception.NoValidHost: No valid host was found. 
2026-08-21 03:49:42.059 8 ERROR nova.conductor.manager 
2026-08-21 03:49:42.059 8 ERROR nova.conductor.manager 
2026-08-21 03:49:42.151 8 WARNING nova.scheduler.utils [None req-c0e63710-6c76-499f-a519-74209450bb2e aa13c3aa229544ac8802d665892a821d fd9bb05c39504489b864f92298c37d61 - - 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. 
2026-08-21 03:49:42.152 8 WARNING nova.scheduler.utils [None req-c0e63710-6c76-499f-a519-74209450bb2e aa13c3aa229544ac8802d665892a821d fd9bb05c39504489b864f92298c37d61 - - default default] [instance: 5e8cae05-02dd-4b85-8131-cf9f5deee64a] Setting instance to ERROR state.: nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-08-21 03:50:12.032 7 ERROR nova.conductor.manager [None req-daf5a463-0456-4710-8b58-8f1e3325b80a b3ced370976340d5aa7ddaac18252259 fd1cd0179a404175b0ce0848c4c406f6 - - 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.
2026-08-21 03:50:12.032 7 ERROR nova.conductor.manager Traceback (most recent call last):
2026-08-21 03:50:12.032 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
2026-08-21 03:50:12.032 7 ERROR nova.conductor.manager     host_lists = self._schedule_instances(context, request_specs[0],
2026-08-21 03:50:12.032 7 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:50:12.032 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/conductor/manager.py", line 942, in _schedule_instances
2026-08-21 03:50:12.032 7 ERROR nova.conductor.manager     host_lists = self.query_client.select_destinations(
2026-08-21 03:50:12.032 7 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:50:12.032 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/client/query.py", line 41, in select_destinations
2026-08-21 03:50:12.032 7 ERROR nova.conductor.manager     return self.scheduler_rpcapi.select_destinations(context, spec_obj,
2026-08-21 03:50:12.032 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:50:12.032 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/rpcapi.py", line 160, in select_destinations
2026-08-21 03:50:12.032 7 ERROR nova.conductor.manager     return cctxt.call(ctxt, 'select_destinations', **msg_args)
2026-08-21 03:50:12.032 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:50:12.032 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/client.py", line 190, in call
2026-08-21 03:50:12.032 7 ERROR nova.conductor.manager     result = self.transport._send(
2026-08-21 03:50:12.032 7 ERROR nova.conductor.manager              ^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:50:12.032 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/transport.py", line 123, in _send
2026-08-21 03:50:12.032 7 ERROR nova.conductor.manager     return self._driver.send(target, ctxt, message,
2026-08-21 03:50:12.032 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:50:12.032 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 806, in send
2026-08-21 03:50:12.032 7 ERROR nova.conductor.manager     return self._send(target, ctxt, message, wait_for_reply, timeout,
2026-08-21 03:50:12.032 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:50:12.032 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 798, in _send
2026-08-21 03:50:12.032 7 ERROR nova.conductor.manager     raise result
2026-08-21 03:50:12.032 7 ERROR nova.conductor.manager nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-08-21 03:50:12.032 7 ERROR nova.conductor.manager Traceback (most recent call last):
2026-08-21 03:50:12.032 7 ERROR nova.conductor.manager 
2026-08-21 03:50:12.032 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/server.py", line 269, in inner
2026-08-21 03:50:12.032 7 ERROR nova.conductor.manager     return func(*args, **kwargs)
2026-08-21 03:50:12.032 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^
2026-08-21 03:50:12.032 7 ERROR nova.conductor.manager 
2026-08-21 03:50:12.032 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/manager.py", line 255, in select_destinations
2026-08-21 03:50:12.032 7 ERROR nova.conductor.manager     raise exception.NoValidHost(reason="")
2026-08-21 03:50:12.032 7 ERROR nova.conductor.manager 
2026-08-21 03:50:12.032 7 ERROR nova.conductor.manager nova.exception.NoValidHost: No valid host was found. 
2026-08-21 03:50:12.032 7 ERROR nova.conductor.manager 
2026-08-21 03:50:12.032 7 ERROR nova.conductor.manager 
2026-08-21 03:50:12.124 7 WARNING nova.scheduler.utils [None req-daf5a463-0456-4710-8b58-8f1e3325b80a b3ced370976340d5aa7ddaac18252259 fd1cd0179a404175b0ce0848c4c406f6 - - 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. 
2026-08-21 03:50:12.125 7 WARNING nova.scheduler.utils [None req-daf5a463-0456-4710-8b58-8f1e3325b80a b3ced370976340d5aa7ddaac18252259 fd1cd0179a404175b0ce0848c4c406f6 - - default default] [instance: add10c46-d032-4d2c-9000-5d99afb63897] Setting instance to ERROR state.: nova.exception_Remote.NoValidHost_Remote: No valid host was found.