On 09/27/2012 03:21 PM, ybronhei wrote:
On 09/26/2012 04:06 AM, Mark Wu wrote:
On 09/26/2012 12:58 AM, Nathanaël Blanchet wrote:
Hello,
I've tried many times to run a node as a guest in ovirt following
http://wiki.ovirt.org/wiki/Vdsm_Developers#Running_Node_as_guest_-_Nested_KVM
. The result is that I'm able to register such a host in engine, but
it is impossible to start any vm on it. If I boot on an ISO, I can
see the first prompt and move between the items. But since I begin
the installation I have a blank screen and the vm goes into pause
mode in vit-manager. Then I have no way else than rebooting the
hypervisor guest because it is impossible to resume. When I get logs
on the real host, I can find this :
arning : x86Decode:1306 : Preferred CPU model Westmere not allowed
by hypervisor; closest supported model will be used
Sep 25 17:11:59 khamsin libvirtd[23053]: 2012-09-25
15:11:59.384+0000: 23054: warning : x86Decode:1306 : Preferred CPU
model Westmere not allowed by hypervisor; closest supported model
will be used
Sep 25 17:12:19 khamsin libvirtd[23053]: 2012-09-25
15:12:19.150+0000: 23055: warning : x86Decode:1306 : Preferred CPU
model Westmere not allowed by hypervisor; closest supported model
will be used
Sep 25 17:45:48 khamsin libvirtd[23053]: 2012-09-25
15:45:48.342+0000: 23058: warning : x86Decode:1306 : Preferred CPU
model Westmere not allowed by hypervisor; closest supported model
will be used
Sep 25 18:07:05 khamsin libvirtd[23053]: 2012-09-25
16:07:05.834+0000: 23058: warning : x86Decode:1306 : Preferred CPU
model Nehalem not allowed by hypervisor; closest supported model
will be used
Sep 25 18:44:47 khamsin libvirtd[23053]: 2012-09-25
16:44:47.340+0000: 23057: warning : x86Decode:1306 : Preferred CPU
model Penryn not allowed by hypervisor; closest supported model will
be used
As you can see, I have tried many cpu type for launching this guest
hypervisor, but none of them is accepted by the hypervisor. Plus,
I've modified each time the family type in the cluster tab, but it
is the same.
On the hist:
#virsh capabilities gives
<cpu>
<arch>x86_64</arch>
<model>Westmere</model>
<vendor>Intel</vendor>
Thanks for your help
What does the command 'qemu-kvm -cpu ?' give ? Could you please try
the following guest cpu definition?
*
<cpu match='exact'>
<model>core2duo</model>
<feature policy='require' name='vmx'/>
</cpu>
*
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I've got error too during definition of nested kvm.
When i run qemu-kvm cpu ? i get: Unable to find x86 CPU definition. do
you know why? what does this command show?
how do i add your configuration suggestion to my guest cpu?
Here's the output of "qemu-kvm -cpu ?". It shows us which cpu models
qemu can emulate.
x86 Opteron_G3
x86 Opteron_G2
x86 Opteron_G1
x86 Nehalem
x86 Penryn
x86 Conroe
x86 [n270]
x86 [athlon]
x86 [pentium3]
x86 [pentium2]
x86 [pentium]
x86 [486]
x86 [coreduo]
x86 [kvm32]
x86 [qemu32]
x86 [kvm64]
x86 [core2duo]
x86 [phenom]
x86 [qemu64]
You can use 'virsh edit' or edit the xml configuration file of the vm to
specify the cpu model. Just put the cpu definition into the root
(domain) tag.
<domain type='kvm'>
<cpu mode='custom' match='exact'>
<model fallback='allow'>core2duo</model>
<feature policy='require' name='vmx'/>
</cpu>
After that, you should be able to see it in the output of 'virsh
dumpxml'. And the cpuinfo from guest should read like this:
#cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 15
model name : Intel(R) Core(TM)2 Duo CPU T7700 @ 2.40GHz
--
Yaniv Bronhaim.
RedHat, Israel
09-7692289
054-7744187
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