Openstack KVM libvirtError: internal error: no supported architecture for os type 'hvm'

Nova Error Log
===========
2015-05-06 16:50:22.982 1187 ERROR nova.compute.manager [-] [instance: fdc97e3f-25f0-4d4d-b649-4a6d4aff8545] Instance failed to spawn
2015-05-06 16:50:22.982 1187 TRACE nova.compute.manager [instance: fdc97e3f-25f0-4d4d-b649-4a6d4aff8545] Traceback (most recent call last):
2015-05-06 16:50:22.982 1187 TRACE nova.compute.manager [instance: fdc97e3f-25f0-4d4d-b649-4a6d4aff8545]   File "/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 2246, in _build_resources
2015-05-06 16:50:22.982 1187 TRACE nova.compute.manager [instance: fdc97e3f-25f0-4d4d-b649-4a6d4aff8545]     yield resources
2015-05-06 16:50:22.982 1187 TRACE nova.compute.manager [instance: fdc97e3f-25f0-4d4d-b649-4a6d4aff8545]   File "/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 2116, in _build_and_run_instance
2015-05-06 16:50:22.982 1187 TRACE nova.compute.manager [instance: fdc97e3f-25f0-4d4d-b649-4a6d4aff8545]     block_device_info=block_device_info)
2015-05-06 16:50:22.982 1187 TRACE nova.compute.manager [instance: fdc97e3f-25f0-4d4d-b649-4a6d4aff8545]   File "/usr/lib/python2.7/site-packages/nova/virt/libvirt/driver.py", line 2622, in spawn
2015-05-06 16:50:22.982 1187 TRACE nova.compute.manager [instance: fdc97e3f-25f0-4d4d-b649-4a6d4aff8545]     block_device_info, disk_info=disk_info)
2015-05-06 16:50:22.982 1187 TRACE nova.compute.manager [instance: fdc97e3f-25f0-4d4d-b649-4a6d4aff8545]   File "/usr/lib/python2.7/site-packages/nova/virt/libvirt/driver.py", line 4425, in _create_domain_and_network
2015-05-06 16:50:22.982 1187 TRACE nova.compute.manager [instance: fdc97e3f-25f0-4d4d-b649-4a6d4aff8545]     power_on=power_on)
2015-05-06 16:50:22.982 1187 TRACE nova.compute.manager [instance: fdc97e3f-25f0-4d4d-b649-4a6d4aff8545]   File "/usr/lib/python2.7/site-packages/nova/virt/libvirt/driver.py", line 4349, in _create_domain
2015-05-06 16:50:22.982 1187 TRACE nova.compute.manager [instance: fdc97e3f-25f0-4d4d-b649-4a6d4aff8545]     LOG.error(err)
2015-05-06 16:50:22.982 1187 TRACE nova.compute.manager [instance: fdc97e3f-25f0-4d4d-b649-4a6d4aff8545]   File "/usr/lib/python2.7/site-packages/nova/openstack/common/excutils.py", line 82, in __exit__
2015-05-06 16:50:22.982 1187 TRACE nova.compute.manager [instance: fdc97e3f-25f0-4d4d-b649-4a6d4aff8545]     six.reraise(self.type_, self.value, self.tb)
2015-05-06 16:50:22.982 1187 TRACE nova.compute.manager [instance: fdc97e3f-25f0-4d4d-b649-4a6d4aff8545]   File "/usr/lib/python2.7/site-packages/nova/virt/libvirt/driver.py", line 4333, in _create_domain
2015-05-06 16:50:22.982 1187 TRACE nova.compute.manager [instance: fdc97e3f-25f0-4d4d-b649-4a6d4aff8545]     domain = self._conn.defineXML(xml)
2015-05-06 16:50:22.982 1187 TRACE nova.compute.manager [instance: fdc97e3f-25f0-4d4d-b649-4a6d4aff8545]   File "/usr/lib/python2.7/site-packages/eventlet/tpool.py", line 183, in doit
2015-05-06 16:50:22.982 1187 TRACE nova.compute.manager [instance: fdc97e3f-25f0-4d4d-b649-4a6d4aff8545]     result = proxy_call(self._autowrap, f, *args, **kwargs)
2015-05-06 16:50:22.982 1187 TRACE nova.compute.manager [instance: fdc97e3f-25f0-4d4d-b649-4a6d4aff8545]   File "/usr/lib/python2.7/site-packages/eventlet/tpool.py", line 141, in proxy_call
2015-05-06 16:50:22.982 1187 TRACE nova.compute.manager [instance: fdc97e3f-25f0-4d4d-b649-4a6d4aff8545]     rv = execute(f, *args, **kwargs)
2015-05-06 16:50:22.982 1187 TRACE nova.compute.manager [instance: fdc97e3f-25f0-4d4d-b649-4a6d4aff8545]   File "/usr/lib/python2.7/site-packages/eventlet/tpool.py", line 122, in execute
2015-05-06 16:50:22.982 1187 TRACE nova.compute.manager [instance: fdc97e3f-25f0-4d4d-b649-4a6d4aff8545]     six.reraise(c, e, tb)
2015-05-06 16:50:22.982 1187 TRACE nova.compute.manager [instance: fdc97e3f-25f0-4d4d-b649-4a6d4aff8545]   File "/usr/lib/python2.7/site-packages/eventlet/tpool.py", line 80, in tworker
2015-05-06 16:50:22.982 1187 TRACE nova.compute.manager [instance: fdc97e3f-25f0-4d4d-b649-4a6d4aff8545]     rv = meth(*args, **kwargs)
2015-05-06 16:50:22.982 1187 TRACE nova.compute.manager [instance: fdc97e3f-25f0-4d4d-b649-4a6d4aff8545]   File "/usr/lib64/python2.7/site-packages/libvirt.py", line 3445, in defineXML
2015-05-06 16:50:22.982 1187 TRACE nova.compute.manager [instance: fdc97e3f-25f0-4d4d-b649-4a6d4aff8545]     if ret is None:raise libvirtError('virDomainDefineXML() failed', conn=self)
2015-05-06 16:50:22.982 1187 TRACE nova.compute.manager [instance: fdc97e3f-25f0-4d4d-b649-4a6d4aff8545] libvirtError: internal error: no supported architecture for os type 'hvm'
2015-05-06 16:50:22.982 1187 TRACE nova.compute.manager [instance: fdc97e3f-25f0-4d4d-b649-4a6d4aff8545]
2015-05-06 16:50:22.987 1187 WARNING nova.virt.libvirt.driver [-] [instance: fdc97e3f-25f0-4d4d-b649-4a6d4aff8545] During wait destroy, instance disappeared


Fix
===#IF we need to enable qemu
openstack-config --set /etc/nova/nova.conf DEFAULT libvirt_type qemu
openstack-config --set /etc/nova/nova.conf libvirt virt_type qemu