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You can search nested kvm on the web to get more info, or you can try 
just use qemu not kvm on 2nd level.

On 2014?08?06? 11:32, Chen CH Ji wrote:
>
> Thanks a lot for your suggestions , I guess it might be 2nd level 
> configuration issue ... will take more time on it , thanks
>
>
> my 1st level host has following output when 'virsh capabilities'
>
> <host>
> <uuid>c476d525-bba7-e211-98a9-9cd4d92d1300</uuid>
>     <cpu>
> <arch>x86_64</arch>
> <model>SandyBridge</model>
> <vendor>Intel</vendor>
>       <topology sockets='1' cores='4' threads='1'/>
>       <feature name='erms'/>
>       <feature name='smep'/>
>       <feature name='fsgsbase'/>
>       <feature name='rdrand'/>
>       <feature name='f16c'/>
>       <feature name='osxsave'/>
>       <feature name='pcid'/>
>       <feature name='pdcm'/>
>       <feature name='xtpr'/>
>       <feature name='tm2'/>
>       <feature name='est'/>
>       <feature name='smx'/>
>       <feature name='vmx'/>
>       <feature name='ds_cpl'/>
>       <feature name='monitor'/>
>       <feature name='dtes64'/>
>       <feature name='pbe'/>
>       <feature name='tm'/>
>       <feature name='ht'/>
>       <feature name='ss'/>
>       <feature name='acpi'/>
>       <feature name='ds'/>
>       <feature name='vme'/>
>     </cpu>
>
> while the output on 2nd level is
>
> <host>
> <uuid>a1bb0066-80d2-f9db-aa4e-0520a0562875</uuid>
>     <cpu>
> <arch>x86_64</arch>
>       <topology sockets='1' cores='1' threads='1'/>
>     </cpu>
>
>
>
>
> Best Regards!
>
> Kevin (Chen) Ji ? ?
>
> Engineer, zVM Development, CSTL
> Notes: Chen CH Ji/China/IBM at IBMCN   Internet: jichenjc at cn.ibm.com
> Phone: +86-10-82454158
> Address: 3/F Ring Building, ZhongGuanCun Software Park, Haidian 
> District, Beijing 100193, PRC
>
> Inactive hide details for Rafael Folco ---08/06/2014 02:11:26 AM---cat 
> /proc/cpuinfo Make sure the cpu model and version is lisRafael Folco 
> ---08/06/2014 02:11:26 AM---cat /proc/cpuinfo Make sure the cpu model 
> and version is listed on
>
> From: Rafael Folco <rafaelfolco at gmail.com>
> To: "OpenStack Development Mailing List (not for usage questions)" 
> <openstack-dev at lists.openstack.org>,
> Date: 08/06/2014 02:11 AM
> Subject: Re: [openstack-dev] [nova] libvirtError: XML error: Missing 
> CPU model name on 2nd level vm
>
> ------------------------------------------------------------------------
>
>
>
> cat /proc/cpuinfo
> Make sure the cpu model and version is listed on 
> /usr/share/libvirt/cpu_map.xml
>
> Hope this helps.
>
>
>
>
> On Tue, Aug 5, 2014 at 2:49 PM, Solly Ross <_sross at redhat.com_ 
> <mailto:sross at redhat.com>> wrote:
>
>     Hi Kevin,
>     Running devstack in a VM is perfectly doable.  Many developers use
>     devstack inside a VM (I run mine inside a VM launched using libvirt
>     on KVM).  I can't comment on the issue that you're encountering,
>     but perhaps something wasn't configured correctly when you
>     launched the
>     VM?
>
>     Best Regards,
>     Solly Ross
>
>     ----- Original Message -----
>     > From: "Chen CH Ji" <_jichenjc at cn.ibm.com_
>     <mailto:jichenjc at cn.ibm.com>>
>     > To: _openstack-dev at lists.openstack.org_
>     <mailto:openstack-dev at lists.openstack.org>
>     > Sent: Friday, August 1, 2014 5:04:16 AM
>     > Subject: [openstack-dev] [nova] libvirtError: XML error: Missing
>     CPU model name on 2nd level vm
>     >
>     >
>     >
>     > Hi
>     > I don't have a real PC to so created a test env ,so I created a
>     2nd level env
>     > (create a kvm virtual machine on top of a physical host then run
>     devstack o
>     > the vm)
>     > I am not sure whether it's doable because I saw following error
>     when start
>     > nova-compute service , is it a bug or I need to update my
>     configuration
>     > instead? thanks
>     >
>     >
>     > 2014-08-01 17:04:51.532 DEBUG nova.virt.libvirt.config [-]
>     Generated XML
>     > ('<cpu>\n <arch>x86_64</arch>\n <topology sockets="1" cores="1"
>     > threads="1"/>\n</cpu>\n',) from (pid=16956) to_xml
>     > /opt/stack/nova/nova/virt/libvirt/config.py:79
>     > Traceback (most recent call last):
>     > File "/usr/lib/python2.7/dist-packages/eventlet/hubs/hub.py",
>     line 346, in
>     > fire_timers
>     > timer()
>     > File "/usr/lib/python2.7/dist-packages/eventlet/hubs/timer.py",
>     line 56, in
>     > __call__
>     > cb(*args, **kw)
>     > File "/usr/lib/python2.7/dist-packages/eventlet/event.py", line
>     163, in
>     > _do_send
>     > waiter.switch(result)
>     > File "/usr/lib/python2.7/dist-packages/eventlet/greenthread.py",
>     line 194, in
>     > main
>     > result = function(*args, **kwargs)
>     > File "/opt/stack/nova/nova/openstack/common/service.py", line
>     490, in
>     > run_service
>     > service.start()
>     > File "/opt/stack/nova/nova/service.py", line 164, in start
>     > self.manager.init_host()
>     > File "/opt/stack/nova/nova/compute/manager.py", line 1055, in
>     init_host
>     > self.driver.init_host(host=self.host)
>     > File "/opt/stack/nova/nova/virt/libvirt/driver.py", line 633, in
>     init_host
>     > self._do_quality_warnings()
>     > File "/opt/stack/nova/nova/virt/libvirt/driver.py", line 616, in
>     > _do_quality_warnings
>     > caps = self._get_host_capabilities()
>     > File "/opt/stack/nova/nova/virt/libvirt/driver.py", line 2942, in
>     > _get_host_capabilities
>     > libvirt.VIR_CONNECT_BASELINE_CPU_EXPAND_FEATURES)
>     > File "/usr/lib/python2.7/dist-packages/eventlet/tpool.py", line
>     179, in doit
>     > result = proxy_call(self._autowrap, f, *args, **kwargs)
>     > File "/usr/lib/python2.7/dist-packages/eventlet/tpool.py", line
>     139, in
>     > proxy_call
>     > rv = execute(f,*args,**kwargs)
>     > File "/usr/lib/python2.7/dist-packages/eventlet/tpool.py", line
>     77, in
>     > tworker
>     > rv = meth(*args,**kwargs)
>     > File "/usr/lib/python2.7/dist-packages/libvirt.py", line 3127,
>     in baselineCPU
>     > if ret is None: raise libvirtError ('virConnectBaselineCPU()
>     failed',
>     > conn=self)
>     > libvirtError: XML error: Missing CPU model name
>     >
>     > Best Regards!
>     >
>     > Kevin (Chen) Ji ? ?
>     >
>     > Engineer, zVM Development, CSTL
>     > Notes: Chen CH Ji/China/IBM at IBMCN Internet:
>     _jichenjc at cn.ibm.com_ <mailto:jichenjc at cn.ibm.com>
>     > Phone: _+86-10-82454158_ <tel:%2B86-10-82454158>
>     > Address: 3/F Ring Building, ZhongGuanCun Software Park, Haidian
>     District,
>     > Beijing 100193, PRC
>     >
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