+ exec nova-conductor --config-file /etc/nova/nova.conf
2026-02-25 20:23:38.824 1 INFO nova.utils [None req-8291e95a-6478-4d6a-af6c-f897d5a3c8fa - - - - - -] The cell worker thread pool MainProcess.cell_worker is initialized
2026-02-25 20:23:38.923 1 INFO oslo_service.backend._eventlet.service [None req-8291e95a-6478-4d6a-af6c-f897d5a3c8fa - - - - - -] Starting 2 workers
2026-02-25 20:23:38.933 7 INFO nova.service [-] Starting conductor node (version 32.1.0)
2026-02-25 20:23:38.936 8 INFO nova.service [-] Starting conductor node (version 32.1.0)
2026-02-25 20:23:38.937 1 WARNING oslo_config.cfg [None req-8291e95a-6478-4d6a-af6c-f897d5a3c8fa - - - - - -] 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.
2026-02-25 20:59:30.120 7 ERROR nova.conductor.manager [None req-7cec165e-1dbc-4727-b1a2-8d469b6c8577 912b055e27fa4bd2a31026d4b30a1176 51a43fc8cda64fbf807d3822ec8bab2c - - 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.
2026-02-25 20:59:30.120 7 ERROR nova.conductor.manager Traceback (most recent call last):
2026-02-25 20:59:30.120 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
2026-02-25 20:59:30.120 7 ERROR nova.conductor.manager     host_lists = self._schedule_instances(context, request_specs[0],
2026-02-25 20:59:30.120 7 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 20:59:30.120 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/conductor/manager.py", line 942, in _schedule_instances
2026-02-25 20:59:30.120 7 ERROR nova.conductor.manager     host_lists = self.query_client.select_destinations(
2026-02-25 20:59:30.120 7 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 20:59:30.120 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/client/query.py", line 41, in select_destinations
2026-02-25 20:59:30.120 7 ERROR nova.conductor.manager     return self.scheduler_rpcapi.select_destinations(context, spec_obj,
2026-02-25 20:59:30.120 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 20:59:30.120 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/rpcapi.py", line 160, in select_destinations
2026-02-25 20:59:30.120 7 ERROR nova.conductor.manager     return cctxt.call(ctxt, 'select_destinations', **msg_args)
2026-02-25 20:59:30.120 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 20:59:30.120 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/client.py", line 180, in call
2026-02-25 20:59:30.120 7 ERROR nova.conductor.manager     result = self.transport._send(
2026-02-25 20:59:30.120 7 ERROR nova.conductor.manager              ^^^^^^^^^^^^^^^^^^^^^
2026-02-25 20:59:30.120 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/transport.py", line 123, in _send
2026-02-25 20:59:30.120 7 ERROR nova.conductor.manager     return self._driver.send(target, ctxt, message,
2026-02-25 20:59:30.120 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 20:59:30.120 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 800, in send
2026-02-25 20:59:30.120 7 ERROR nova.conductor.manager     return self._send(target, ctxt, message, wait_for_reply, timeout,
2026-02-25 20:59:30.120 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 20:59:30.120 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 792, in _send
2026-02-25 20:59:30.120 7 ERROR nova.conductor.manager     raise result
2026-02-25 20:59:30.120 7 ERROR nova.conductor.manager nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-02-25 20:59:30.120 7 ERROR nova.conductor.manager Traceback (most recent call last):
2026-02-25 20:59:30.120 7 ERROR nova.conductor.manager 
2026-02-25 20:59:30.120 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/server.py", line 269, in inner
2026-02-25 20:59:30.120 7 ERROR nova.conductor.manager     return func(*args, **kwargs)
2026-02-25 20:59:30.120 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^
2026-02-25 20:59:30.120 7 ERROR nova.conductor.manager 
2026-02-25 20:59:30.120 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/manager.py", line 255, in select_destinations
2026-02-25 20:59:30.120 7 ERROR nova.conductor.manager     raise exception.NoValidHost(reason="")
2026-02-25 20:59:30.120 7 ERROR nova.conductor.manager 
2026-02-25 20:59:30.120 7 ERROR nova.conductor.manager nova.exception.NoValidHost: No valid host was found. 
2026-02-25 20:59:30.120 7 ERROR nova.conductor.manager 
2026-02-25 20:59:30.120 7 ERROR nova.conductor.manager 
2026-02-25 20:59:30.321 7 WARNING nova.scheduler.utils [None req-7cec165e-1dbc-4727-b1a2-8d469b6c8577 912b055e27fa4bd2a31026d4b30a1176 51a43fc8cda64fbf807d3822ec8bab2c - - 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. 
2026-02-25 20:59:30.323 7 WARNING nova.scheduler.utils [None req-7cec165e-1dbc-4727-b1a2-8d469b6c8577 912b055e27fa4bd2a31026d4b30a1176 51a43fc8cda64fbf807d3822ec8bab2c - - default default] [instance: 892d3246-bed5-40c8-9536-148ff8f81f82] Setting instance to ERROR state.: nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-02-25 20:59:30.368 7 WARNING oslo_config.cfg [None req-7cec165e-1dbc-4727-b1a2-8d469b6c8577 912b055e27fa4bd2a31026d4b30a1176 51a43fc8cda64fbf807d3822ec8bab2c - - 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. 
2026-02-25 20:59:32.107 8 ERROR nova.conductor.manager [None req-32c7a33c-aa02-480a-9377-532ec97eb4f9 53b141011cd748ebb33872e7136298d2 10e83aac4dcb4e49a3c613e10a8a1e50 - - 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.
2026-02-25 20:59:32.107 8 ERROR nova.conductor.manager Traceback (most recent call last):
2026-02-25 20:59:32.107 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
2026-02-25 20:59:32.107 8 ERROR nova.conductor.manager     host_lists = self._schedule_instances(context, request_specs[0],
2026-02-25 20:59:32.107 8 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 20:59:32.107 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/conductor/manager.py", line 942, in _schedule_instances
2026-02-25 20:59:32.107 8 ERROR nova.conductor.manager     host_lists = self.query_client.select_destinations(
2026-02-25 20:59:32.107 8 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 20:59:32.107 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/client/query.py", line 41, in select_destinations
2026-02-25 20:59:32.107 8 ERROR nova.conductor.manager     return self.scheduler_rpcapi.select_destinations(context, spec_obj,
2026-02-25 20:59:32.107 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 20:59:32.107 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/rpcapi.py", line 160, in select_destinations
2026-02-25 20:59:32.107 8 ERROR nova.conductor.manager     return cctxt.call(ctxt, 'select_destinations', **msg_args)
2026-02-25 20:59:32.107 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 20:59:32.107 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/client.py", line 180, in call
2026-02-25 20:59:32.107 8 ERROR nova.conductor.manager     result = self.transport._send(
2026-02-25 20:59:32.107 8 ERROR nova.conductor.manager              ^^^^^^^^^^^^^^^^^^^^^
2026-02-25 20:59:32.107 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/transport.py", line 123, in _send
2026-02-25 20:59:32.107 8 ERROR nova.conductor.manager     return self._driver.send(target, ctxt, message,
2026-02-25 20:59:32.107 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 20:59:32.107 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 800, in send
2026-02-25 20:59:32.107 8 ERROR nova.conductor.manager     return self._send(target, ctxt, message, wait_for_reply, timeout,
2026-02-25 20:59:32.107 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 20:59:32.107 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 792, in _send
2026-02-25 20:59:32.107 8 ERROR nova.conductor.manager     raise result
2026-02-25 20:59:32.107 8 ERROR nova.conductor.manager nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-02-25 20:59:32.107 8 ERROR nova.conductor.manager Traceback (most recent call last):
2026-02-25 20:59:32.107 8 ERROR nova.conductor.manager 
2026-02-25 20:59:32.107 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/server.py", line 269, in inner
2026-02-25 20:59:32.107 8 ERROR nova.conductor.manager     return func(*args, **kwargs)
2026-02-25 20:59:32.107 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^
2026-02-25 20:59:32.107 8 ERROR nova.conductor.manager 
2026-02-25 20:59:32.107 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/manager.py", line 255, in select_destinations
2026-02-25 20:59:32.107 8 ERROR nova.conductor.manager     raise exception.NoValidHost(reason="")
2026-02-25 20:59:32.107 8 ERROR nova.conductor.manager 
2026-02-25 20:59:32.107 8 ERROR nova.conductor.manager nova.exception.NoValidHost: No valid host was found. 
2026-02-25 20:59:32.107 8 ERROR nova.conductor.manager 
2026-02-25 20:59:32.107 8 ERROR nova.conductor.manager 
2026-02-25 20:59:32.324 8 WARNING nova.scheduler.utils [None req-32c7a33c-aa02-480a-9377-532ec97eb4f9 53b141011cd748ebb33872e7136298d2 10e83aac4dcb4e49a3c613e10a8a1e50 - - 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. 
2026-02-25 20:59:32.325 8 WARNING nova.scheduler.utils [None req-32c7a33c-aa02-480a-9377-532ec97eb4f9 53b141011cd748ebb33872e7136298d2 10e83aac4dcb4e49a3c613e10a8a1e50 - - default default] [instance: a7c297e1-badc-420f-a149-5356c6e34d14] Setting instance to ERROR state.: nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-02-25 20:59:32.363 8 WARNING oslo_config.cfg [None req-32c7a33c-aa02-480a-9377-532ec97eb4f9 53b141011cd748ebb33872e7136298d2 10e83aac4dcb4e49a3c613e10a8a1e50 - - 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. 
2026-02-25 20:59:40.008 7 ERROR nova.conductor.manager [None req-11a4dade-7c38-40c2-964b-4f3cb625ae47 ebc80a035d1d41078ee4711040f85c27 c5a0a2bf9e814242accb45a8fdd87c9d - - 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.
2026-02-25 20:59:40.008 7 ERROR nova.conductor.manager Traceback (most recent call last):
2026-02-25 20:59:40.008 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
2026-02-25 20:59:40.008 7 ERROR nova.conductor.manager     host_lists = self._schedule_instances(context, request_specs[0],
2026-02-25 20:59:40.008 7 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 20:59:40.008 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/conductor/manager.py", line 942, in _schedule_instances
2026-02-25 20:59:40.008 7 ERROR nova.conductor.manager     host_lists = self.query_client.select_destinations(
2026-02-25 20:59:40.008 7 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 20:59:40.008 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/client/query.py", line 41, in select_destinations
2026-02-25 20:59:40.008 7 ERROR nova.conductor.manager     return self.scheduler_rpcapi.select_destinations(context, spec_obj,
2026-02-25 20:59:40.008 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 20:59:40.008 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/rpcapi.py", line 160, in select_destinations
2026-02-25 20:59:40.008 7 ERROR nova.conductor.manager     return cctxt.call(ctxt, 'select_destinations', **msg_args)
2026-02-25 20:59:40.008 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 20:59:40.008 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/client.py", line 180, in call
2026-02-25 20:59:40.008 7 ERROR nova.conductor.manager     result = self.transport._send(
2026-02-25 20:59:40.008 7 ERROR nova.conductor.manager              ^^^^^^^^^^^^^^^^^^^^^
2026-02-25 20:59:40.008 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/transport.py", line 123, in _send
2026-02-25 20:59:40.008 7 ERROR nova.conductor.manager     return self._driver.send(target, ctxt, message,
2026-02-25 20:59:40.008 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 20:59:40.008 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 800, in send
2026-02-25 20:59:40.008 7 ERROR nova.conductor.manager     return self._send(target, ctxt, message, wait_for_reply, timeout,
2026-02-25 20:59:40.008 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 20:59:40.008 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 792, in _send
2026-02-25 20:59:40.008 7 ERROR nova.conductor.manager     raise result
2026-02-25 20:59:40.008 7 ERROR nova.conductor.manager nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-02-25 20:59:40.008 7 ERROR nova.conductor.manager Traceback (most recent call last):
2026-02-25 20:59:40.008 7 ERROR nova.conductor.manager 
2026-02-25 20:59:40.008 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/server.py", line 269, in inner
2026-02-25 20:59:40.008 7 ERROR nova.conductor.manager     return func(*args, **kwargs)
2026-02-25 20:59:40.008 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^
2026-02-25 20:59:40.008 7 ERROR nova.conductor.manager 
2026-02-25 20:59:40.008 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/manager.py", line 255, in select_destinations
2026-02-25 20:59:40.008 7 ERROR nova.conductor.manager     raise exception.NoValidHost(reason="")
2026-02-25 20:59:40.008 7 ERROR nova.conductor.manager 
2026-02-25 20:59:40.008 7 ERROR nova.conductor.manager nova.exception.NoValidHost: No valid host was found. 
2026-02-25 20:59:40.008 7 ERROR nova.conductor.manager 
2026-02-25 20:59:40.008 7 ERROR nova.conductor.manager 
2026-02-25 20:59:40.095 7 WARNING nova.scheduler.utils [None req-11a4dade-7c38-40c2-964b-4f3cb625ae47 ebc80a035d1d41078ee4711040f85c27 c5a0a2bf9e814242accb45a8fdd87c9d - - 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. 
2026-02-25 20:59:40.096 7 WARNING nova.scheduler.utils [None req-11a4dade-7c38-40c2-964b-4f3cb625ae47 ebc80a035d1d41078ee4711040f85c27 c5a0a2bf9e814242accb45a8fdd87c9d - - default default] [instance: 91be1407-ff04-4dcd-a6b4-6bb742a5fb97] Setting instance to ERROR state.: nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-02-25 20:59:48.061 8 ERROR nova.conductor.manager [None req-c6b6f31c-daec-42c2-a523-b2741dc5dbe9 c2ec79d879894d8e989ae4d20d960577 b4c255232e5146b28577bcacd3ed9b08 - - 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.
2026-02-25 20:59:48.061 8 ERROR nova.conductor.manager Traceback (most recent call last):
2026-02-25 20:59:48.061 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
2026-02-25 20:59:48.061 8 ERROR nova.conductor.manager     host_lists = self._schedule_instances(context, request_specs[0],
2026-02-25 20:59:48.061 8 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 20:59:48.061 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/conductor/manager.py", line 942, in _schedule_instances
2026-02-25 20:59:48.061 8 ERROR nova.conductor.manager     host_lists = self.query_client.select_destinations(
2026-02-25 20:59:48.061 8 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 20:59:48.061 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/client/query.py", line 41, in select_destinations
2026-02-25 20:59:48.061 8 ERROR nova.conductor.manager     return self.scheduler_rpcapi.select_destinations(context, spec_obj,
2026-02-25 20:59:48.061 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 20:59:48.061 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/rpcapi.py", line 160, in select_destinations
2026-02-25 20:59:48.061 8 ERROR nova.conductor.manager     return cctxt.call(ctxt, 'select_destinations', **msg_args)
2026-02-25 20:59:48.061 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 20:59:48.061 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/client.py", line 180, in call
2026-02-25 20:59:48.061 8 ERROR nova.conductor.manager     result = self.transport._send(
2026-02-25 20:59:48.061 8 ERROR nova.conductor.manager              ^^^^^^^^^^^^^^^^^^^^^
2026-02-25 20:59:48.061 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/transport.py", line 123, in _send
2026-02-25 20:59:48.061 8 ERROR nova.conductor.manager     return self._driver.send(target, ctxt, message,
2026-02-25 20:59:48.061 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 20:59:48.061 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 800, in send
2026-02-25 20:59:48.061 8 ERROR nova.conductor.manager     return self._send(target, ctxt, message, wait_for_reply, timeout,
2026-02-25 20:59:48.061 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 20:59:48.061 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 792, in _send
2026-02-25 20:59:48.061 8 ERROR nova.conductor.manager     raise result
2026-02-25 20:59:48.061 8 ERROR nova.conductor.manager nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-02-25 20:59:48.061 8 ERROR nova.conductor.manager Traceback (most recent call last):
2026-02-25 20:59:48.061 8 ERROR nova.conductor.manager 
2026-02-25 20:59:48.061 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/server.py", line 269, in inner
2026-02-25 20:59:48.061 8 ERROR nova.conductor.manager     return func(*args, **kwargs)
2026-02-25 20:59:48.061 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^
2026-02-25 20:59:48.061 8 ERROR nova.conductor.manager 
2026-02-25 20:59:48.061 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/manager.py", line 255, in select_destinations
2026-02-25 20:59:48.061 8 ERROR nova.conductor.manager     raise exception.NoValidHost(reason="")
2026-02-25 20:59:48.061 8 ERROR nova.conductor.manager 
2026-02-25 20:59:48.061 8 ERROR nova.conductor.manager nova.exception.NoValidHost: No valid host was found. 
2026-02-25 20:59:48.061 8 ERROR nova.conductor.manager 
2026-02-25 20:59:48.061 8 ERROR nova.conductor.manager 
2026-02-25 20:59:48.163 8 WARNING nova.scheduler.utils [None req-c6b6f31c-daec-42c2-a523-b2741dc5dbe9 c2ec79d879894d8e989ae4d20d960577 b4c255232e5146b28577bcacd3ed9b08 - - 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. 
2026-02-25 20:59:48.165 8 WARNING nova.scheduler.utils [None req-c6b6f31c-daec-42c2-a523-b2741dc5dbe9 c2ec79d879894d8e989ae4d20d960577 b4c255232e5146b28577bcacd3ed9b08 - - default default] [instance: 64144b38-e56c-4f61-a221-2528b45d0de3] Setting instance to ERROR state.: nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-02-25 20:59:54.189 7 ERROR nova.conductor.manager [None req-ef9e9387-7f8f-498f-ac3a-2713a6d64287 26175a729b3d433f82a2401f5f6ad9e3 842e830a5dde4193af5d2ee7e5585a9d - - 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.
2026-02-25 20:59:54.189 7 ERROR nova.conductor.manager Traceback (most recent call last):
2026-02-25 20:59:54.189 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
2026-02-25 20:59:54.189 7 ERROR nova.conductor.manager     host_lists = self._schedule_instances(context, request_specs[0],
2026-02-25 20:59:54.189 7 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 20:59:54.189 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/conductor/manager.py", line 942, in _schedule_instances
2026-02-25 20:59:54.189 7 ERROR nova.conductor.manager     host_lists = self.query_client.select_destinations(
2026-02-25 20:59:54.189 7 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 20:59:54.189 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/client/query.py", line 41, in select_destinations
2026-02-25 20:59:54.189 7 ERROR nova.conductor.manager     return self.scheduler_rpcapi.select_destinations(context, spec_obj,
2026-02-25 20:59:54.189 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 20:59:54.189 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/rpcapi.py", line 160, in select_destinations
2026-02-25 20:59:54.189 7 ERROR nova.conductor.manager     return cctxt.call(ctxt, 'select_destinations', **msg_args)
2026-02-25 20:59:54.189 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 20:59:54.189 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/client.py", line 180, in call
2026-02-25 20:59:54.189 7 ERROR nova.conductor.manager     result = self.transport._send(
2026-02-25 20:59:54.189 7 ERROR nova.conductor.manager              ^^^^^^^^^^^^^^^^^^^^^
2026-02-25 20:59:54.189 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/transport.py", line 123, in _send
2026-02-25 20:59:54.189 7 ERROR nova.conductor.manager     return self._driver.send(target, ctxt, message,
2026-02-25 20:59:54.189 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 20:59:54.189 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 800, in send
2026-02-25 20:59:54.189 7 ERROR nova.conductor.manager     return self._send(target, ctxt, message, wait_for_reply, timeout,
2026-02-25 20:59:54.189 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 20:59:54.189 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 792, in _send
2026-02-25 20:59:54.189 7 ERROR nova.conductor.manager     raise result
2026-02-25 20:59:54.189 7 ERROR nova.conductor.manager nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-02-25 20:59:54.189 7 ERROR nova.conductor.manager Traceback (most recent call last):
2026-02-25 20:59:54.189 7 ERROR nova.conductor.manager 
2026-02-25 20:59:54.189 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/server.py", line 269, in inner
2026-02-25 20:59:54.189 7 ERROR nova.conductor.manager     return func(*args, **kwargs)
2026-02-25 20:59:54.189 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^
2026-02-25 20:59:54.189 7 ERROR nova.conductor.manager 
2026-02-25 20:59:54.189 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/manager.py", line 255, in select_destinations
2026-02-25 20:59:54.189 7 ERROR nova.conductor.manager     raise exception.NoValidHost(reason="")
2026-02-25 20:59:54.189 7 ERROR nova.conductor.manager 
2026-02-25 20:59:54.189 7 ERROR nova.conductor.manager nova.exception.NoValidHost: No valid host was found. 
2026-02-25 20:59:54.189 7 ERROR nova.conductor.manager 
2026-02-25 20:59:54.189 7 ERROR nova.conductor.manager 
2026-02-25 20:59:54.284 7 WARNING nova.scheduler.utils [None req-ef9e9387-7f8f-498f-ac3a-2713a6d64287 26175a729b3d433f82a2401f5f6ad9e3 842e830a5dde4193af5d2ee7e5585a9d - - 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. 
2026-02-25 20:59:54.285 7 WARNING nova.scheduler.utils [None req-ef9e9387-7f8f-498f-ac3a-2713a6d64287 26175a729b3d433f82a2401f5f6ad9e3 842e830a5dde4193af5d2ee7e5585a9d - - default default] [instance: a8017b4f-037f-4e3d-8105-63997238ca28] Setting instance to ERROR state.: nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-02-25 21:00:00.624 8 ERROR nova.conductor.manager [None req-372534f2-df9b-44b2-a0fc-d811a38760f6 2c68b072b7b04c1db33d5820925926f8 c9de9896b51f4d76a221926b73c7bafd - - 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.
2026-02-25 21:00:00.624 8 ERROR nova.conductor.manager Traceback (most recent call last):
2026-02-25 21:00:00.624 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
2026-02-25 21:00:00.624 8 ERROR nova.conductor.manager     host_lists = self._schedule_instances(context, request_specs[0],
2026-02-25 21:00:00.624 8 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 21:00:00.624 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/conductor/manager.py", line 942, in _schedule_instances
2026-02-25 21:00:00.624 8 ERROR nova.conductor.manager     host_lists = self.query_client.select_destinations(
2026-02-25 21:00:00.624 8 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 21:00:00.624 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/client/query.py", line 41, in select_destinations
2026-02-25 21:00:00.624 8 ERROR nova.conductor.manager     return self.scheduler_rpcapi.select_destinations(context, spec_obj,
2026-02-25 21:00:00.624 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 21:00:00.624 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/rpcapi.py", line 160, in select_destinations
2026-02-25 21:00:00.624 8 ERROR nova.conductor.manager     return cctxt.call(ctxt, 'select_destinations', **msg_args)
2026-02-25 21:00:00.624 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 21:00:00.624 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/client.py", line 180, in call
2026-02-25 21:00:00.624 8 ERROR nova.conductor.manager     result = self.transport._send(
2026-02-25 21:00:00.624 8 ERROR nova.conductor.manager              ^^^^^^^^^^^^^^^^^^^^^
2026-02-25 21:00:00.624 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/transport.py", line 123, in _send
2026-02-25 21:00:00.624 8 ERROR nova.conductor.manager     return self._driver.send(target, ctxt, message,
2026-02-25 21:00:00.624 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 21:00:00.624 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 800, in send
2026-02-25 21:00:00.624 8 ERROR nova.conductor.manager     return self._send(target, ctxt, message, wait_for_reply, timeout,
2026-02-25 21:00:00.624 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 21:00:00.624 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 792, in _send
2026-02-25 21:00:00.624 8 ERROR nova.conductor.manager     raise result
2026-02-25 21:00:00.624 8 ERROR nova.conductor.manager nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-02-25 21:00:00.624 8 ERROR nova.conductor.manager Traceback (most recent call last):
2026-02-25 21:00:00.624 8 ERROR nova.conductor.manager 
2026-02-25 21:00:00.624 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/server.py", line 269, in inner
2026-02-25 21:00:00.624 8 ERROR nova.conductor.manager     return func(*args, **kwargs)
2026-02-25 21:00:00.624 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^
2026-02-25 21:00:00.624 8 ERROR nova.conductor.manager 
2026-02-25 21:00:00.624 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/manager.py", line 255, in select_destinations
2026-02-25 21:00:00.624 8 ERROR nova.conductor.manager     raise exception.NoValidHost(reason="")
2026-02-25 21:00:00.624 8 ERROR nova.conductor.manager 
2026-02-25 21:00:00.624 8 ERROR nova.conductor.manager nova.exception.NoValidHost: No valid host was found. 
2026-02-25 21:00:00.624 8 ERROR nova.conductor.manager 
2026-02-25 21:00:00.624 8 ERROR nova.conductor.manager 
2026-02-25 21:00:00.740 8 WARNING nova.scheduler.utils [None req-372534f2-df9b-44b2-a0fc-d811a38760f6 2c68b072b7b04c1db33d5820925926f8 c9de9896b51f4d76a221926b73c7bafd - - 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. 
2026-02-25 21:00:00.741 8 WARNING nova.scheduler.utils [None req-372534f2-df9b-44b2-a0fc-d811a38760f6 2c68b072b7b04c1db33d5820925926f8 c9de9896b51f4d76a221926b73c7bafd - - default default] [instance: 4126ad9e-b499-45e9-acf0-3be3bf861b7d] Setting instance to ERROR state.: nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-02-25 21:01:01.046 7 ERROR nova.conductor.manager [None req-48d5bb76-6da6-4e39-896a-4cbbb106f66b 9e93b26a7d7e483eb4edd6cf367723ba 11a547d1db19413ba92b0b6095ee93f7 - - 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.
2026-02-25 21:01:01.046 7 ERROR nova.conductor.manager Traceback (most recent call last):
2026-02-25 21:01:01.046 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
2026-02-25 21:01:01.046 7 ERROR nova.conductor.manager     host_lists = self._schedule_instances(context, request_specs[0],
2026-02-25 21:01:01.046 7 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 21:01:01.046 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/conductor/manager.py", line 942, in _schedule_instances
2026-02-25 21:01:01.046 7 ERROR nova.conductor.manager     host_lists = self.query_client.select_destinations(
2026-02-25 21:01:01.046 7 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 21:01:01.046 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/client/query.py", line 41, in select_destinations
2026-02-25 21:01:01.046 7 ERROR nova.conductor.manager     return self.scheduler_rpcapi.select_destinations(context, spec_obj,
2026-02-25 21:01:01.046 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 21:01:01.046 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/rpcapi.py", line 160, in select_destinations
2026-02-25 21:01:01.046 7 ERROR nova.conductor.manager     return cctxt.call(ctxt, 'select_destinations', **msg_args)
2026-02-25 21:01:01.046 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 21:01:01.046 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/client.py", line 180, in call
2026-02-25 21:01:01.046 7 ERROR nova.conductor.manager     result = self.transport._send(
2026-02-25 21:01:01.046 7 ERROR nova.conductor.manager              ^^^^^^^^^^^^^^^^^^^^^
2026-02-25 21:01:01.046 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/transport.py", line 123, in _send
2026-02-25 21:01:01.046 7 ERROR nova.conductor.manager     return self._driver.send(target, ctxt, message,
2026-02-25 21:01:01.046 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 21:01:01.046 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 800, in send
2026-02-25 21:01:01.046 7 ERROR nova.conductor.manager     return self._send(target, ctxt, message, wait_for_reply, timeout,
2026-02-25 21:01:01.046 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 21:01:01.046 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 792, in _send
2026-02-25 21:01:01.046 7 ERROR nova.conductor.manager     raise result
2026-02-25 21:01:01.046 7 ERROR nova.conductor.manager nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-02-25 21:01:01.046 7 ERROR nova.conductor.manager Traceback (most recent call last):
2026-02-25 21:01:01.046 7 ERROR nova.conductor.manager 
2026-02-25 21:01:01.046 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/server.py", line 269, in inner
2026-02-25 21:01:01.046 7 ERROR nova.conductor.manager     return func(*args, **kwargs)
2026-02-25 21:01:01.046 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^
2026-02-25 21:01:01.046 7 ERROR nova.conductor.manager 
2026-02-25 21:01:01.046 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/manager.py", line 255, in select_destinations
2026-02-25 21:01:01.046 7 ERROR nova.conductor.manager     raise exception.NoValidHost(reason="")
2026-02-25 21:01:01.046 7 ERROR nova.conductor.manager 
2026-02-25 21:01:01.046 7 ERROR nova.conductor.manager nova.exception.NoValidHost: No valid host was found. 
2026-02-25 21:01:01.046 7 ERROR nova.conductor.manager 
2026-02-25 21:01:01.046 7 ERROR nova.conductor.manager 
2026-02-25 21:01:01.147 7 WARNING nova.scheduler.utils [None req-48d5bb76-6da6-4e39-896a-4cbbb106f66b 9e93b26a7d7e483eb4edd6cf367723ba 11a547d1db19413ba92b0b6095ee93f7 - - 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. 
2026-02-25 21:01:01.147 7 WARNING nova.scheduler.utils [None req-48d5bb76-6da6-4e39-896a-4cbbb106f66b 9e93b26a7d7e483eb4edd6cf367723ba 11a547d1db19413ba92b0b6095ee93f7 - - default default] [instance: f450641e-105a-4e8f-bb6b-d6e4cba415c8] Setting instance to ERROR state.: nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-02-25 21:01:03.777 8 ERROR nova.conductor.manager [None req-4a94da7c-d262-4240-b580-074f6751745b 32776cfcbefd4e5288c1b3e481d206ae 7ace3b2518b24c5b81e2da858690a817 - - 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.
2026-02-25 21:01:03.777 8 ERROR nova.conductor.manager Traceback (most recent call last):
2026-02-25 21:01:03.777 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
2026-02-25 21:01:03.777 8 ERROR nova.conductor.manager     host_lists = self._schedule_instances(context, request_specs[0],
2026-02-25 21:01:03.777 8 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 21:01:03.777 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/conductor/manager.py", line 942, in _schedule_instances
2026-02-25 21:01:03.777 8 ERROR nova.conductor.manager     host_lists = self.query_client.select_destinations(
2026-02-25 21:01:03.777 8 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 21:01:03.777 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/client/query.py", line 41, in select_destinations
2026-02-25 21:01:03.777 8 ERROR nova.conductor.manager     return self.scheduler_rpcapi.select_destinations(context, spec_obj,
2026-02-25 21:01:03.777 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 21:01:03.777 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/rpcapi.py", line 160, in select_destinations
2026-02-25 21:01:03.777 8 ERROR nova.conductor.manager     return cctxt.call(ctxt, 'select_destinations', **msg_args)
2026-02-25 21:01:03.777 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 21:01:03.777 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/client.py", line 180, in call
2026-02-25 21:01:03.777 8 ERROR nova.conductor.manager     result = self.transport._send(
2026-02-25 21:01:03.777 8 ERROR nova.conductor.manager              ^^^^^^^^^^^^^^^^^^^^^
2026-02-25 21:01:03.777 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/transport.py", line 123, in _send
2026-02-25 21:01:03.777 8 ERROR nova.conductor.manager     return self._driver.send(target, ctxt, message,
2026-02-25 21:01:03.777 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 21:01:03.777 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 800, in send
2026-02-25 21:01:03.777 8 ERROR nova.conductor.manager     return self._send(target, ctxt, message, wait_for_reply, timeout,
2026-02-25 21:01:03.777 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 21:01:03.777 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 792, in _send
2026-02-25 21:01:03.777 8 ERROR nova.conductor.manager     raise result
2026-02-25 21:01:03.777 8 ERROR nova.conductor.manager nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-02-25 21:01:03.777 8 ERROR nova.conductor.manager Traceback (most recent call last):
2026-02-25 21:01:03.777 8 ERROR nova.conductor.manager 
2026-02-25 21:01:03.777 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/server.py", line 269, in inner
2026-02-25 21:01:03.777 8 ERROR nova.conductor.manager     return func(*args, **kwargs)
2026-02-25 21:01:03.777 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^
2026-02-25 21:01:03.777 8 ERROR nova.conductor.manager 
2026-02-25 21:01:03.777 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/manager.py", line 255, in select_destinations
2026-02-25 21:01:03.777 8 ERROR nova.conductor.manager     raise exception.NoValidHost(reason="")
2026-02-25 21:01:03.777 8 ERROR nova.conductor.manager 
2026-02-25 21:01:03.777 8 ERROR nova.conductor.manager nova.exception.NoValidHost: No valid host was found. 
2026-02-25 21:01:03.777 8 ERROR nova.conductor.manager 
2026-02-25 21:01:03.777 8 ERROR nova.conductor.manager 
2026-02-25 21:01:03.882 8 WARNING nova.scheduler.utils [None req-4a94da7c-d262-4240-b580-074f6751745b 32776cfcbefd4e5288c1b3e481d206ae 7ace3b2518b24c5b81e2da858690a817 - - 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. 
2026-02-25 21:01:03.883 8 WARNING nova.scheduler.utils [None req-4a94da7c-d262-4240-b580-074f6751745b 32776cfcbefd4e5288c1b3e481d206ae 7ace3b2518b24c5b81e2da858690a817 - - default default] [instance: 6610b6e9-9f12-4767-bcb2-11dd877df49b] Setting instance to ERROR state.: nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-02-25 21:01:24.955 7 ERROR nova.conductor.manager [None req-3e2fca16-0313-427d-bda5-48fbd3f8a6d6 1178fe01140a4346932352089f07cd15 4c1e2294ce074a4abd123912d3316a17 - - 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.
2026-02-25 21:01:24.955 7 ERROR nova.conductor.manager Traceback (most recent call last):
2026-02-25 21:01:24.955 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
2026-02-25 21:01:24.955 7 ERROR nova.conductor.manager     host_lists = self._schedule_instances(context, request_specs[0],
2026-02-25 21:01:24.955 7 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 21:01:24.955 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/conductor/manager.py", line 942, in _schedule_instances
2026-02-25 21:01:24.955 7 ERROR nova.conductor.manager     host_lists = self.query_client.select_destinations(
2026-02-25 21:01:24.955 7 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 21:01:24.955 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/client/query.py", line 41, in select_destinations
2026-02-25 21:01:24.955 7 ERROR nova.conductor.manager     return self.scheduler_rpcapi.select_destinations(context, spec_obj,
2026-02-25 21:01:24.955 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 21:01:24.955 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/rpcapi.py", line 160, in select_destinations
2026-02-25 21:01:24.955 7 ERROR nova.conductor.manager     return cctxt.call(ctxt, 'select_destinations', **msg_args)
2026-02-25 21:01:24.955 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 21:01:24.955 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/client.py", line 180, in call
2026-02-25 21:01:24.955 7 ERROR nova.conductor.manager     result = self.transport._send(
2026-02-25 21:01:24.955 7 ERROR nova.conductor.manager              ^^^^^^^^^^^^^^^^^^^^^
2026-02-25 21:01:24.955 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/transport.py", line 123, in _send
2026-02-25 21:01:24.955 7 ERROR nova.conductor.manager     return self._driver.send(target, ctxt, message,
2026-02-25 21:01:24.955 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 21:01:24.955 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 800, in send
2026-02-25 21:01:24.955 7 ERROR nova.conductor.manager     return self._send(target, ctxt, message, wait_for_reply, timeout,
2026-02-25 21:01:24.955 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 21:01:24.955 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 792, in _send
2026-02-25 21:01:24.955 7 ERROR nova.conductor.manager     raise result
2026-02-25 21:01:24.955 7 ERROR nova.conductor.manager nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-02-25 21:01:24.955 7 ERROR nova.conductor.manager Traceback (most recent call last):
2026-02-25 21:01:24.955 7 ERROR nova.conductor.manager 
2026-02-25 21:01:24.955 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/server.py", line 269, in inner
2026-02-25 21:01:24.955 7 ERROR nova.conductor.manager     return func(*args, **kwargs)
2026-02-25 21:01:24.955 7 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^
2026-02-25 21:01:24.955 7 ERROR nova.conductor.manager 
2026-02-25 21:01:24.955 7 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/manager.py", line 255, in select_destinations
2026-02-25 21:01:24.955 7 ERROR nova.conductor.manager     raise exception.NoValidHost(reason="")
2026-02-25 21:01:24.955 7 ERROR nova.conductor.manager 
2026-02-25 21:01:24.955 7 ERROR nova.conductor.manager nova.exception.NoValidHost: No valid host was found. 
2026-02-25 21:01:24.955 7 ERROR nova.conductor.manager 
2026-02-25 21:01:24.955 7 ERROR nova.conductor.manager 
2026-02-25 21:01:25.101 7 WARNING nova.scheduler.utils [None req-3e2fca16-0313-427d-bda5-48fbd3f8a6d6 1178fe01140a4346932352089f07cd15 4c1e2294ce074a4abd123912d3316a17 - - 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. 
2026-02-25 21:01:25.103 7 WARNING nova.scheduler.utils [None req-3e2fca16-0313-427d-bda5-48fbd3f8a6d6 1178fe01140a4346932352089f07cd15 4c1e2294ce074a4abd123912d3316a17 - - default default] [instance: 5c52dd49-8550-4628-a73b-3c2fdecdc305] Setting instance to ERROR state.: nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-02-25 21:01:44.788 8 ERROR nova.conductor.manager [None req-72828e0b-5c46-42ba-84f7-0df779bc5f69 c8159ff457754ac29d9f77c8dff8d4c7 abfa8495b8784e6c9a3d8bda6a11367d - - 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.
2026-02-25 21:01:44.788 8 ERROR nova.conductor.manager Traceback (most recent call last):
2026-02-25 21:01:44.788 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
2026-02-25 21:01:44.788 8 ERROR nova.conductor.manager     host_lists = self._schedule_instances(context, request_specs[0],
2026-02-25 21:01:44.788 8 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 21:01:44.788 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/conductor/manager.py", line 942, in _schedule_instances
2026-02-25 21:01:44.788 8 ERROR nova.conductor.manager     host_lists = self.query_client.select_destinations(
2026-02-25 21:01:44.788 8 ERROR nova.conductor.manager                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 21:01:44.788 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/client/query.py", line 41, in select_destinations
2026-02-25 21:01:44.788 8 ERROR nova.conductor.manager     return self.scheduler_rpcapi.select_destinations(context, spec_obj,
2026-02-25 21:01:44.788 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 21:01:44.788 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/rpcapi.py", line 160, in select_destinations
2026-02-25 21:01:44.788 8 ERROR nova.conductor.manager     return cctxt.call(ctxt, 'select_destinations', **msg_args)
2026-02-25 21:01:44.788 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 21:01:44.788 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/client.py", line 180, in call
2026-02-25 21:01:44.788 8 ERROR nova.conductor.manager     result = self.transport._send(
2026-02-25 21:01:44.788 8 ERROR nova.conductor.manager              ^^^^^^^^^^^^^^^^^^^^^
2026-02-25 21:01:44.788 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/transport.py", line 123, in _send
2026-02-25 21:01:44.788 8 ERROR nova.conductor.manager     return self._driver.send(target, ctxt, message,
2026-02-25 21:01:44.788 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 21:01:44.788 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 800, in send
2026-02-25 21:01:44.788 8 ERROR nova.conductor.manager     return self._send(target, ctxt, message, wait_for_reply, timeout,
2026-02-25 21:01:44.788 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-02-25 21:01:44.788 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 792, in _send
2026-02-25 21:01:44.788 8 ERROR nova.conductor.manager     raise result
2026-02-25 21:01:44.788 8 ERROR nova.conductor.manager nova.exception_Remote.NoValidHost_Remote: No valid host was found. 
2026-02-25 21:01:44.788 8 ERROR nova.conductor.manager Traceback (most recent call last):
2026-02-25 21:01:44.788 8 ERROR nova.conductor.manager 
2026-02-25 21:01:44.788 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/oslo_messaging/rpc/server.py", line 269, in inner
2026-02-25 21:01:44.788 8 ERROR nova.conductor.manager     return func(*args, **kwargs)
2026-02-25 21:01:44.788 8 ERROR nova.conductor.manager            ^^^^^^^^^^^^^^^^^^^^^
2026-02-25 21:01:44.788 8 ERROR nova.conductor.manager 
2026-02-25 21:01:44.788 8 ERROR nova.conductor.manager   File "/var/lib/openstack/lib/python3.12/site-packages/nova/scheduler/manager.py", line 255, in select_destinations
2026-02-25 21:01:44.788 8 ERROR nova.conductor.manager     raise exception.NoValidHost(reason="")
2026-02-25 21:01:44.788 8 ERROR nova.conductor.manager 
2026-02-25 21:01:44.788 8 ERROR nova.conductor.manager nova.exception.NoValidHost: No valid host was found. 
2026-02-25 21:01:44.788 8 ERROR nova.conductor.manager 
2026-02-25 21:01:44.788 8 ERROR nova.conductor.manager 
2026-02-25 21:01:44.937 8 WARNING nova.scheduler.utils [None req-72828e0b-5c46-42ba-84f7-0df779bc5f69 c8159ff457754ac29d9f77c8dff8d4c7 abfa8495b8784e6c9a3d8bda6a11367d - - 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. 
2026-02-25 21:01:44.938 8 WARNING nova.scheduler.utils [None req-72828e0b-5c46-42ba-84f7-0df779bc5f69 c8159ff457754ac29d9f77c8dff8d4c7 abfa8495b8784e6c9a3d8bda6a11367d - - default default] [instance: 9fb54e1a-6f0d-4b06-bc28-d5086c58b41e] Setting instance to ERROR state.: nova.exception_Remote.NoValidHost_Remote: No valid host was found.