[未解决]openstack启动实例失败:Build of instance bc914749-28a5-4ada-9a73-3867bf9b33af aborted: cannot import name 'strutils'

　　todo 20201019,使用devstack安装openstack，成功创建实例,自动启动实例时失败，暂时未知道原因，还在查找资料和请教专家．

　　报错：Build of instance bc914749-28a5-4ada-9a73-3867bf9b33af aborted: cannot import name 'strutils'

　　详情：

Traceback (most recent call last): File "/opt/stack/nova/nova/compute/manager.py", line 1964, in _prep_block_device wait_func=self._await_block_device_map_created) File "/opt/stack/nova/nova/virt/block_device.py", line 874, in attach_block_devices _log_and_attach(device) File "/opt/stack/nova/nova/virt/block_device.py", line 871, in _log_and_attach bdm.attach(*attach_args, **attach_kwargs) File "/opt/stack/nova/nova/virt/block_device.py", line 774, in attach context, instance, volume_api, virt_driver) File "/opt/stack/nova/nova/virt/block_device.py", line 46, in wrapped ret_val = method(obj, context, *args, **kwargs) File "/opt/stack/nova/nova/virt/block_device.py", line 673, in attach virt_driver, do_driver_attach) File "/opt/stack/nova/nova/virt/block_device.py", line 651, in _do_attach connector = virt_driver.get_volume_connector(instance) File "/opt/stack/nova/nova/virt/libvirt/driver.py", line 1521, in get_volume_connector host=CONF.host) File "/usr/local/lib/python3.6/dist-packages/os_brick/utils.py", line 157, in trace_logging_wrapper result = f(*args, **kwargs) File "/usr/local/lib/python3.6/dist-packages/os_brick/initiator/connector.py", line 234, in get_connector_properties execute=execute)) File "/usr/local/lib/python3.6/dist-packages/os_brick/initiator/connectors/iscsi.py", line 68, in get_connector_properties initiator = iscsi.get_initiator() File "/usr/local/lib/python3.6/dist-packages/os_brick/initiator/connectors/iscsi.py", line 973, in get_initiator root_helper=self._root_helper) File "/usr/local/lib/python3.6/dist-packages/os_brick/executor.py", line 52, in _execute result = self.__execute(*args, **kwargs) File "/usr/local/lib/python3.6/dist-packages/os_brick/privileged/rootwrap.py", line 169, in execute return execute_root(*cmd, **kwargs) File "/usr/local/lib/python3.6/dist-packages/oslo_privsep/priv_context.py", line 247, in _wrap return self.channel.remote_call(name, args, kwargs) File "/usr/local/lib/python3.6/dist-packages/oslo_privsep/daemon.py", line 224, in remote_call raise exc_type(*result[2]) ImportError: cannot import name 'strutils' During handling of the above exception, another exception occurred: Traceback (most recent call last): File "/opt/stack/nova/nova/compute/manager.py", line 2591, in _build_resources block_device_mapping) File "/opt/stack/nova/nova/compute/manager.py", line 1982, in _prep_block_device raise exception.InvalidBDM(six.text_type(ex)) nova.exception.InvalidBDM: cannot import name 'strutils' During handling of the above exception, another exception occurred: Traceback (most recent call last): File "/opt/stack/nova/nova/compute/manager.py", line 2221, in _do_build_and_run_instance filter_properties, request_spec, accel_uuids) File "/opt/stack/nova/nova/compute/manager.py", line 2429, in _build_and_run_instance bdms=block_device_mapping) File "/opt/stack/.local/lib/python3.6/site-packages/oslo_utils/excutils.py", line 220, in __exit__ self.force_reraise() File "/opt/stack/.local/lib/python3.6/site-packages/oslo_utils/excutils.py", line 196, in force_reraise six.reraise(self.type_, self.value, self.tb) File "/usr/local/lib/python3.6/dist-packages/six.py", line 703, in reraise raise value File "/opt/stack/nova/nova/compute/manager.py", line 2380, in _build_and_run_instance accel_uuids) as resources: File "/usr/lib/python3.6/contextlib.py", line 81, in __enter__ return next(self.gen) File "/opt/stack/nova/nova/compute/manager.py", line 2601, in _build_resources reason=e.format_message()) nova.exception.BuildAbortException: Build of instance bc914749-28a5-4ada-9a73-3867bf9b33af aborted: cannot import name 'strutils'