** Also affects: nova/victoria
Importance: Undecided
Status: New
** Changed in: nova/victoria
Status: New => Fix Released
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https://bugs.launchpad.net/bugs/1896496
Title:
Combination of 'hw_video_ram' image metadata prop,
'hw_video:ram_max_mb' extra spec raises error
Status in OpenStack Compute (nova):
Fix Released
Status in OpenStack Compute (nova) victoria series:
Fix Released
Bug description:
The 'hw_video_ram' image metadata property is used to configure the
amount of memory allocated to VRAM. Using it requires specifying the
'hw_video:ram_max_mb' extra spec or you'll get the following error:
nova.exception.RequestedVRamTooHigh: The requested amount of video
memory 8 is higher than the maximum allowed by flavor 0.
However, specifying these currently results in a libvirt failure.
ERROR nova.compute.manager [None ...] [instance:
11a71ae4-e410-4856-aeab-eea6ca4784c5] Failed to build and run instance:
libvirt.libvirtError: XML error: cannot parse video vram '8192.0'
ERROR nova.compute.manager [instance: ...] Traceback (most recent call
last):
ERROR nova.compute.manager [instance: ...] File
"/opt/stack/nova/nova/compute/manager.py", line 2333, in _build_and_run_instance
ERROR nova.compute.manager [instance: ...] accel_info=accel_info)
ERROR nova.compute.manager [instance: ...] File
"/opt/stack/nova/nova/virt/libvirt/driver.py", line 3632, in spawn
ERROR nova.compute.manager [instance: ...]
cleanup_instance_disks=created_disks)
ERROR nova.compute.manager [instance: ...] File
"/opt/stack/nova/nova/virt/libvirt/driver.py", line 6527, in
_create_domain_and_network
ERROR nova.compute.manager [instance: ...]
cleanup_instance_disks=cleanup_instance_disks)
ERROR nova.compute.manager [instance: ...] File
"/usr/local/lib/python3.6/dist-packages/oslo_utils/excutils.py", line 220, in
__exit__
ERROR nova.compute.manager [instance: ...] self.force_reraise()
ERROR nova.compute.manager [instance: ...] File
"/usr/local/lib/python3.6/dist-packages/oslo_utils/excutils.py", line 196, in
force_reraise
ERROR nova.compute.manager [instance: ...] six.reraise(self.type_,
self.value, self.tb)
ERROR nova.compute.manager [instance: ...] File
"/usr/local/lib/python3.6/dist-packages/six.py", line 703, in reraise
ERROR nova.compute.manager [instance: ...] raise value
ERROR nova.compute.manager [instance: ...] File
"/opt/stack/nova/nova/virt/libvirt/driver.py", line 6496, in
_create_domain_and_network
ERROR nova.compute.manager [instance: ...]
post_xml_callback=post_xml_callback)
ERROR nova.compute.manager [instance: ...] File
"/opt/stack/nova/nova/virt/libvirt/driver.py", line 6425, in _create_domain
ERROR nova.compute.manager [instance: ...] guest =
libvirt_guest.Guest.create(xml, self._host)
ERROR nova.compute.manager [instance: ...] File
"/opt/stack/nova/nova/virt/libvirt/guest.py", line 127, in create
ERROR nova.compute.manager [instance: ...] encodeutils.safe_decode(xml))
ERROR nova.compute.manager [instance: ...] File
"/usr/local/lib/python3.6/dist-packages/oslo_utils/excutils.py", line 220, in
__exit__
ERROR nova.compute.manager [instance: ...] self.force_reraise()
ERROR nova.compute.manager [instance: ...] File
"/usr/local/lib/python3.6/dist-packages/oslo_utils/excutils.py", line 196, in
force_reraise
ERROR nova.compute.manager [instance: ...] six.reraise(self.type_,
self.value, self.tb)
ERROR nova.compute.manager [instance: ...] File
"/usr/local/lib/python3.6/dist-packages/six.py", line 703, in reraise
ERROR nova.compute.manager [instance: ...] raise value
ERROR nova.compute.manager [instance: ...] File
"/opt/stack/nova/nova/virt/libvirt/guest.py", line 123, in create
ERROR nova.compute.manager [instance: ...] guest =
host.write_instance_config(xml)
ERROR nova.compute.manager [instance: ...] File
"/opt/stack/nova/nova/virt/libvirt/host.py", line 1135, in write_instance_config
ERROR nova.compute.manager [instance: ...] domain =
self.get_connection().defineXML(xml)
ERROR nova.compute.manager [instance: ...] File
"/usr/local/lib/python3.6/dist-packages/eventlet/tpool.py", line 190, in doit
ERROR nova.compute.manager [instance: ...] result =
proxy_call(self._autowrap, f, *args, **kwargs)
ERROR nova.compute.manager [instance: ...] File
"/usr/local/lib/python3.6/dist-packages/eventlet/tpool.py", line 148, in
proxy_call
ERROR nova.compute.manager [instance: ...] rv = execute(f, *args,
**kwargs)
ERROR nova.compute.manager [instance: ...] File
"/usr/local/lib/python3.6/dist-packages/eventlet/tpool.py", line 129, in execute
ERROR nova.compute.manager [instance: ...] six.reraise(c, e, tb)
ERROR nova.compute.manager [instance: ...] File
"/usr/local/lib/python3.6/dist-packages/six.py", line 703, in reraise
ERROR nova.compute.manager [instance: ...] raise value
ERROR nova.compute.manager [instance: ...] File
"/usr/local/lib/python3.6/dist-packages/eventlet/tpool.py", line 83, in tworker
ERROR nova.compute.manager [instance: ...] rv = meth(*args, **kwargs)
ERROR nova.compute.manager [instance: ...] File
"/usr/local/lib/python3.6/dist-packages/libvirt.py", line 3703, in defineXML
ERROR nova.compute.manager [instance: ...] if ret is None:raise
libvirtError('virDomainDefineXML() failed', conn=self)
ERROR nova.compute.manager [instance: ...] libvirt.libvirtError: XML error:
cannot parse video vram '8192.0'
ERROR nova.compute.manager [instance: ...]
This appears to be a Python 3 thing, introduced by division of ints
now returning a float.
Steps to reproduce:
1. Set the 'hw_video_ram' image metadata property on an image:
$ openstack image set --property hw_video_ram=8 $IMAGE
2. Set the 'hw_video:ram_max_mb' flavor extra spec on a flavor:
$ openstack flavor update --property hw_video:ram_max_mb=16384
$FLAVOR
3. Create a server using this flavor and image:
$ openstack server create --image $IMAGE --flavor $FLAVOR ... test-
server
Expected result:
Instance should be created with 8MB of VRAM.
Actual result:
Instance fails to create.
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