Public bug reported:
If fail late in a resize operation the instance base directory has
already been renamed but we don't check if it exists before trying to
rename it and thus crash with FileNotFound
{'code': 500, 'created': '2024-08-14T07:02:49Z', 'message':
'FileNotFoundError', 'details': 'Traceback (most recent call last):\n
File "/usr/lib/python3.9/site-packages/nova/compute/manager.py", line
201, in decorated_function\n return function(self, context, *args,
**kwargs)\n File "/usr/lib/python3.9/site-
packages/nova/compute/manager.py", line 5857, in resize_instance\n
self._revert_allocation(context, instance, migration)\n File
"/usr/lib/python3.9/site-packages/oslo_utils/excutils.py", line 227, in
__exit__\n self.force_reraise()\n File "/usr/lib/python3.9/site-
packages/oslo_utils/excutils.py", line 200, in force_reraise\n raise
self.value\n File "/usr/lib/python3.9/site-
packages/nova/compute/manager.py", line 5853, in resize_instance\n
self._resize_instance(context, instance, image, migration,\n File
"/usr/lib/python3.9/site-packages/nova/compute/manager.py", line 5890,
in _resize_instance\n disk_info =
self.driver.migrate_disk_and_power_off(\n File
"/usr/lib/python3.9/site-packages/nova/virt/libvirt/driver.py", line
11521, in migrate_disk_and_power_off\n
self._cleanup_remote_migration(dest, inst_base,\n File
"/usr/lib/python3.9/site-packages/oslo_utils/excutils.py", line 227, in
__exit__\n self.force_reraise()\n File "/usr/lib/python3.9/site-
packages/oslo_utils/excutils.py", line 200, in force_reraise\n raise
self.value\n File "/usr/lib/python3.9/site-
packages/nova/virt/libvirt/driver.py", line 11471, in
migrate_disk_and_power_off\n os.rename(inst_base,
inst_base_resize)\nFileNotFoundError: [Errno 2] No such file or
directory:
\'/var/lib/nova/instances/891d8b95-45ce-4a52-b630-6805648ce67e\' ->
\'/var/lib/nova/instances/891d8b95-45ce-4a52-b630-6805648ce67e_resize\'\n'}
** Affects: nova
Importance: Undecided
Status: In Progress
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https://bugs.launchpad.net/bugs/2076966
Title:
libvirt driver FileNotFound trying to rename old instance base
Status in OpenStack Compute (nova):
In Progress
Bug description:
If fail late in a resize operation the instance base directory has
already been renamed but we don't check if it exists before trying to
rename it and thus crash with FileNotFound
{'code': 500, 'created': '2024-08-14T07:02:49Z', 'message':
'FileNotFoundError', 'details': 'Traceback (most recent call last):\n
File "/usr/lib/python3.9/site-packages/nova/compute/manager.py", line
201, in decorated_function\n return function(self, context, *args,
**kwargs)\n File "/usr/lib/python3.9/site-
packages/nova/compute/manager.py", line 5857, in resize_instance\n
self._revert_allocation(context, instance, migration)\n File
"/usr/lib/python3.9/site-packages/oslo_utils/excutils.py", line 227,
in __exit__\n self.force_reraise()\n File
"/usr/lib/python3.9/site-packages/oslo_utils/excutils.py", line 200,
in force_reraise\n raise self.value\n File
"/usr/lib/python3.9/site-packages/nova/compute/manager.py", line 5853,
in resize_instance\n self._resize_instance(context, instance,
image, migration,\n File "/usr/lib/python3.9/site-
packages/nova/compute/manager.py", line 5890, in _resize_instance\n
disk_info = self.driver.migrate_disk_and_power_off(\n File
"/usr/lib/python3.9/site-packages/nova/virt/libvirt/driver.py", line
11521, in migrate_disk_and_power_off\n
self._cleanup_remote_migration(dest, inst_base,\n File
"/usr/lib/python3.9/site-packages/oslo_utils/excutils.py", line 227,
in __exit__\n self.force_reraise()\n File
"/usr/lib/python3.9/site-packages/oslo_utils/excutils.py", line 200,
in force_reraise\n raise self.value\n File
"/usr/lib/python3.9/site-packages/nova/virt/libvirt/driver.py", line
11471, in migrate_disk_and_power_off\n os.rename(inst_base,
inst_base_resize)\nFileNotFoundError: [Errno 2] No such file or
directory:
\'/var/lib/nova/instances/891d8b95-45ce-4a52-b630-6805648ce67e\' ->
\'/var/lib/nova/instances/891d8b95-45ce-4a52-b630-6805648ce67e_resize\'\n'}
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