** Changed in: nova
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1501831
Title:
Evacuate libvirt instance failed with error 'Cannot load 'disk_format'
in the base class'
Status in OpenStack Compute (nova):
Fix Released
Bug description:
openstack-nova-12.0.0-201509202117
When evacuate a libvirt instance, it failed with the following error:
NotImplementedError: Cannot load 'disk_format' in the base class
2015-09-30 08:04:47.484 19026 ERROR oslo_messaging.rpc.dispatcher File
"/usr/lib/python2.7/site-packages/nova/virt/libvirt/driver.py", line 2431, in
spawn
2015-09-30 08:04:47.484 19026 ERROR oslo_messaging.rpc.dispatcher
block_device_info)
2015-09-30 08:04:47.484 19026 ERROR oslo_messaging.rpc.dispatcher File
"/usr/lib/python2.7/site-packages/nova/virt/libvirt/blockinfo.py", line 630, in
get_disk_info
2015-09-30 08:04:47.484 19026 ERROR oslo_messaging.rpc.dispatcher rescue)
2015-09-30 08:04:47.484 19026 ERROR oslo_messaging.rpc.dispatcher File
"/usr/lib/python2.7/site-packages/nova/virt/libvirt/blockinfo.py", line 537, in
get_disk_mapping
2015-09-30 08:04:47.484 19026 ERROR oslo_messaging.rpc.dispatcher
disk_bus, cdrom_bus, root_device_name)
2015-09-30 08:04:47.484 19026 ERROR oslo_messaging.rpc.dispatcher File
"/usr/lib/python2.7/site-packages/nova/virt/libvirt/blockinfo.py", line 432, in
get_root_info
2015-09-30 08:04:47.484 19026 ERROR oslo_messaging.rpc.dispatcher if
image_meta.disk_format == 'iso':
2015-09-30 08:04:47.484 19026 ERROR oslo_messaging.rpc.dispatcher File
"/usr/lib/python2.7/site-packages/oslo_versionedobjects/base.py", line 66, in
getter
2015-09-30 08:04:47.484 19026 ERROR oslo_messaging.rpc.dispatcher
self.obj_load_attr(name)
2015-09-30 08:04:47.484 19026 ERROR oslo_messaging.rpc.dispatcher File
"/usr/lib/python2.7/site-packages/oslo_versionedobjects/base.py", line 555, in
obj_load_attr
2015-09-30 08:04:47.484 19026 ERROR oslo_messaging.rpc.dispatcher
_("Cannot load '%s' in the base class") % attrname)
2015-09-30 08:04:47.484 19026 ERROR oslo_messaging.rpc.dispatcher
NotImplementedError: Cannot load 'disk_format' in the base class
2015-09-30 08:04:47.484 19026 ERROR oslo_messaging.rpc.dispatcher
When libvirt instance is evacuated, the image_meta is passed in with
{}. So, the disk_format is not populated with the ImageMeta object.
It's unclear to me what's the right way to fix this issue. Should
change ImageMeta's from_dict to make sure 'disk_format' is always
populated or we should add obj_load_attr method to ImageMeta
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