[libvirt] How to solve this problem---libvirtError: this function is not supported by the connection driver: virNWFilterDefineXML

[Zhihong Wang]

Dear all:
I am trying to deploy openstack on xen hypervisor.Since XenSever or XCP  is
not available on our customized virtulization platform. We decide to use
libvirt on xen as a middleware operating the xen hypervisor. But when I try
to boot a instance , xen failed to response and I find the error in my
nova.log as follows:

2012-08-24 09:17:25 ERROR nova.compute.manager
[req-4b60e9a9-680c-457b-bf93-b71fb6230245 562096602c5e41748dd568d5db0f7553
6bd4a2580bcd4bef890d7ba4da82e925] [instance:
3645be21-9b5b-4718-9c9f-f6ba3588f7b4] Instance failed to spawn
2012-08-24 09:17:25 TRACE nova.compute.manager [instance:
3645be21-9b5b-4718-9c9f-f6ba3588f7b4] Traceback (most recent call last):
2012-08-24 09:17:25 TRACE nova.compute.manager [instance:
3645be21-9b5b-4718-9c9f-f6ba3588f7b4]   File
"/usr/lib/python2.6/site-packages/nova-2012.1-py2.6.egg/nova/compute/manager.py",
line 592, in _spawn
2012-08-24 09:17:25 TRACE nova.compute.manager [instance:
3645be21-9b5b-4718-9c9f-f6ba3588f7b4]
self._legacy_nw_info(network_info), block_device_info)
2012-08-24 09:17:25 TRACE nova.compute.manager [instance:
3645be21-9b5b-4718-9c9f-f6ba3588f7b4]   File
"/usr/lib/python2.6/site-packages/nova-2012.1-py2.6.egg/nova/exception.py",
line 114, in wrapped
2012-08-24 09:17:25 TRACE nova.compute.manager [instance:
3645be21-9b5b-4718-9c9f-f6ba3588f7b4]     return f(*args, **kw)
2012-08-24 09:17:25 TRACE nova.compute.manager [instance:
3645be21-9b5b-4718-9c9f-f6ba3588f7b4]   File
"/usr/lib/python2.6/site-packages/nova-2012.1-py2.6.egg/nova/virt/libvirt/connection.py",
line 899, in spawn
2012-08-24 09:17:25 TRACE nova.compute.manager [instance:
3645be21-9b5b-4718-9c9f-f6ba3588f7b4]
self.firewall_driver.setup_basic_filtering(instance, network_info)
2012-08-24 09:17:25 TRACE nova.compute.manager [instance:
3645be21-9b5b-4718-9c9f-f6ba3588f7b4]   File
"/usr/lib/python2.6/site-packages/nova-2012.1-py2.6.egg/nova/virt/libvirt/firewall.py",
line 231, in setup_basic_filtering
2012-08-24 09:17:25 TRACE nova.compute.manager [instance:
3645be21-9b5b-4718-9c9f-f6ba3588f7b4]
self.nwfilter.setup_basic_filtering(instance, network_info)
2012-08-24 09:17:25 TRACE nova.compute.manager [instance:
3645be21-9b5b-4718-9c9f-f6ba3588f7b4]   File
"/usr/lib/python2.6/site-packages/nova-2012.1-py2.6.egg/nova/virt/libvirt/firewall.py",
line 102, in setup_basic_filtering
2012-08-24 09:17:25 TRACE nova.compute.manager [instance:
3645be21-9b5b-4718-9c9f-f6ba3588f7b4]     self._ensure_static_filters()
2012-08-24 09:17:25 TRACE nova.compute.manager [instance:
3645be21-9b5b-4718-9c9f-f6ba3588f7b4]   File
"/usr/lib/python2.6/site-packages/nova-2012.1-py2.6.egg/nova/virt/libvirt/firewall.py",
line 130, in _ensure_static_filters
2012-08-24 09:17:25 TRACE nova.compute.manager [instance:
3645be21-9b5b-4718-9c9f-f6ba3588f7b4]     'allow-dhcp-server']))
2012-08-24 09:17:25 TRACE nova.compute.manager [instance:
3645be21-9b5b-4718-9c9f-f6ba3588f7b4]   File
"/usr/lib/python2.6/site-packages/nova-2012.1-py2.6.egg/nova/virt/libvirt/firewall.py",
line 150, in _define_filter
2012-08-24 09:17:25 TRACE nova.compute.manager [instance:
3645be21-9b5b-4718-9c9f-f6ba3588f7b4]
tpool.execute(self._conn.nwfilterDefineXML, xml)
2012-08-24 09:17:25 TRACE nova.compute.manager [instance:
3645be21-9b5b-4718-9c9f-f6ba3588f7b4]   File
"/usr/lib/python2.6/site-packages/eventlet/tpool.py", line 76, in tworker
2012-08-24 09:17:25 TRACE nova.compute.manager [instance:
3645be21-9b5b-4718-9c9f-f6ba3588f7b4]     rv = meth(*args,**kwargs)
2012-08-24 09:17:25 TRACE nova.compute.manager [instance:
3645be21-9b5b-4718-9c9f-f6ba3588f7b4]   File
"/usr/lib64/python2.6/site-packages/libvirt.py", line 2628, in
nwfilterDefineXML
2012-08-24 09:17:25 TRACE nova.compute.manager [instance:
3645be21-9b5b-4718-9c9f-f6ba3588f7b4]     if ret is None:raise
libvirtError('virNWFilterDefineXML() failed', conn=self)
2012-08-24 09:17:25 TRACE nova.compute.manager [instance:
3645be21-9b5b-4718-9c9f-f6ba3588f7b4] libvirtError: this function is not
supported by the connection driver: virNWFilterDefineXML
2012-08-24 09:17:25 TRACE nova.compute.manager [instance:
3645be21-9b5b-4718-9c9f-f6ba3588f7b4]

It seems that libvirt doesn't support virNWFilterDefineXML on xen,Is there
any good solutions? Or how  much work should be done to add this function
to libvirt?
I would take it into consideration seriously if I could fix this problem
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