We are using the ussuri nova, which already includes the above patch, but still have the problem to start the instance. trace logs are as following: ========================= 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server Traceback (most recent call last): 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server File "/usr/lib/python3/dist-packages/oslo_messaging/rpc/server.py", line 165, in _process_incoming 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server res = self.dispatcher.dispatch(message) 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server File "/usr/lib/python3/dist-packages/oslo_messaging/rpc/dispatcher.py", line 276, in dispatch 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server return self._do_dispatch(endpoint, method, ctxt, args) 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server File "/usr/lib/python3/dist-packages/oslo_messaging/rpc/dispatcher.py", line 196, in _do_dispatch 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server result = func(ctxt, **new_args) 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server File "/usr/lib/python3/dist-packages/nova/exception_wrapper.py", line 79, in wrapped 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server function_name, call_dict, binary, tb) 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server File "/usr/lib/python3/dist-packages/oslo_utils/excutils.py", line 220, in __exit__ 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server self.force_reraise() 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server File "/usr/lib/python3/dist-packages/oslo_utils/excutils.py", line 196, in force_reraise 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server six.reraise(self.type_, self.value, self.tb) 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server File "/usr/lib/python3/dist-packages/six.py", line 703, in reraise 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server raise value 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server File "/usr/lib/python3/dist-packages/nova/exception_wrapper.py", line 69, in wrapped 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server return f(self, context, *args, **kw) 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server File "/usr/lib/python3/dist-packages/nova/compute/manager.py", line 189, in decorated_function 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server "Error: %s", e, instance=instance) 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server File "/usr/lib/python3/dist-packages/oslo_utils/excutils.py", line 220, in __exit__ 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server self.force_reraise() 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server File "/usr/lib/python3/dist-packages/oslo_utils/excutils.py", line 196, in force_reraise 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server six.reraise(self.type_, self.value, self.tb) 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server File "/usr/lib/python3/dist-packages/six.py", line 703, in reraise 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server raise value 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server File "/usr/lib/python3/dist-packages/nova/compute/manager.py", line 159, in decorated_function 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server return function(self, context, *args, **kwargs) 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server File "/usr/lib/python3/dist-packages/nova/compute/utils.py", line 1456, in decorated_function 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server return function(self, context, *args, **kwargs) 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server File "/usr/lib/python3/dist-packages/nova/compute/manager.py", line 217, in decorated_function 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server kwargs['instance'], e, sys.exc_info()) 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server File "/usr/lib/python3/dist-packages/oslo_utils/excutils.py", line 220, in __exit__ 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server self.force_reraise() 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server File "/usr/lib/python3/dist-packages/oslo_utils/excutils.py", line 196, in force_reraise 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server six.reraise(self.type_, self.value, self.tb) 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server File "/usr/lib/python3/dist-packages/six.py", line 703, in reraise 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server raise value 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server File "/usr/lib/python3/dist-packages/nova/compute/manager.py", line 205, in decorated_function 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server return function(self, context, *args, **kwargs) 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server File "/usr/lib/python3/dist-packages/nova/compute/manager.py", line 3713, in reboot_instance 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server do_reboot_instance(context, instance, block_device_info, reboot_type) 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server File "/usr/lib/python3/dist-packages/oslo_concurrency/lockutils.py", line 359, in inner 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server return f(*args, **kwargs) 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server File "/usr/lib/python3/dist-packages/nova/compute/manager.py", line 3712, in do_reboot_instance 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server reboot_type) 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server File "/usr/lib/python3/dist-packages/nova/compute/manager.py", line 3806, in _reboot_instance 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server self._set_instance_obj_error_state(context, instance) 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server File "/usr/lib/python3/dist-packages/oslo_utils/excutils.py", line 220, in __exit__ 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server self.force_reraise() 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server File "/usr/lib/python3/dist-packages/oslo_utils/excutils.py", line 196, in force_reraise 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server six.reraise(self.type_, self.value, self.tb) 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server File "/usr/lib/python3/dist-packages/six.py", line 703, in reraise 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server raise value 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server File "/usr/lib/python3/dist-packages/nova/compute/manager.py", line 3780, in _reboot_instance 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server bad_volumes_callback=bad_volumes_callback) 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server File "/usr/lib/python3/dist-packages/nova/virt/libvirt/driver.py", line 3210, in reboot 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server block_device_info, accel_info) 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server File "/usr/lib/python3/dist-packages/nova/virt/libvirt/driver.py", line 3326, in _hard_reboot 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server vifs_already_plugged=True) 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server File "/usr/lib/python3/dist-packages/nova/virt/libvirt/driver.py", line 6627, in _create_domain_and_network 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server cleanup_instance_disks=cleanup_instance_disks) 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server File "/usr/lib/python3/dist-packages/oslo_utils/excutils.py", line 220, in __exit__ 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server self.force_reraise() 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server File "/usr/lib/python3/dist-packages/oslo_utils/excutils.py", line 196, in force_reraise 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server six.reraise(self.type_, self.value, self.tb) 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server File "/usr/lib/python3/dist-packages/six.py", line 703, in reraise 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server raise value 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server File "/usr/lib/python3/dist-packages/nova/virt/libvirt/driver.py", line 6596, in _create_domain_and_network 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server post_xml_callback=post_xml_callback) 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server File "/usr/lib/python3/dist-packages/nova/virt/libvirt/driver.py", line 6532, in _create_domain 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server guest.launch(pause=pause) 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server File "/usr/lib/python3/dist-packages/nova/virt/libvirt/guest.py", line 142, in launch 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server self._encoded_xml, errors='ignore') 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server File "/usr/lib/python3/dist-packages/oslo_utils/excutils.py", line 220, in __exit__ 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server self.force_reraise() 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server File "/usr/lib/python3/dist-packages/oslo_utils/excutils.py", line 196, in force_reraise 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server six.reraise(self.type_, self.value, self.tb) 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server File "/usr/lib/python3/dist-packages/six.py", line 703, in reraise 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server raise value 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server File "/usr/lib/python3/dist-packages/nova/virt/libvirt/guest.py", line 137, in launch 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server return self._domain.createWithFlags(flags) 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server File "/usr/lib/python3/dist-packages/eventlet/tpool.py", line 193, in doit 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server result = proxy_call(self._autowrap, f, *args, **kwargs) 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server File "/usr/lib/python3/dist-packages/eventlet/tpool.py", line 151, in proxy_call 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server rv = execute(f, *args, **kwargs) 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server File "/usr/lib/python3/dist-packages/eventlet/tpool.py", line 132, in execute 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server six.reraise(c, e, tb) 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server File "/usr/lib/python3/dist-packages/six.py", line 703, in reraise 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server raise value 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server File "/usr/lib/python3/dist-packages/eventlet/tpool.py", line 86, in tworker 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server rv = meth(*args, **kwargs) 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server File "/usr/lib/python3/dist-packages/libvirt.py", line 1265, in createWithFlags 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server if ret == -1: raise libvirtError ('virDomainCreateWithFlags() failed', dom=self) 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server libvirt.libvirtError: Requested operation is not valid: format of backing image '/var/lib/nova/instances/_base/77f1dcc31c932b97c3f1fc4e7c6348b1220f9fa7' of image '/var/lib/nova/instances/86ba53bb-7194-4700-a698-895ef62f7169/disk' was not specified in the image metadata (See https://libvirt.org/kbase/backing_chains.html for troubleshooting) 2021-05-18 10:05:32.386 144075 ERROR oslo_messaging.rpc.server