libvirt users - Apr 2012 - Problems using latest qemu-kvm and latest libvirt ( hvm missing )

Hi all


 I have faced this issue already and the solution was to go back to a
old version of qemu-kvm and/or libvirt and things start falling into
place but this time I would want to solve this.


I have used these versions as per the o/p of the commands below. To
jumpstart a new machine which is libvirt capable, it always is a hastle
to find out which of the version combination of libvirt,qemu-kvm will work.

Just by picking the latest of the two versions does not help and ends up
not supporting hvm at all



$ sudo virsh capabilities
<capabilities>

  <host>
    <uuid>34373030-3635-435a-4a32-313230485156</uuid>
    <cpu>
      <arch>x86_64</arch>
      <model>Westmere</model>
      <vendor>Intel</vendor>
      <topology sockets='2' cores='4'
threads='2'/>
      <feature name='rdtscp'/>
      <feature name='pdpe1gb'/>
      <feature name='dca'/>
      <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='pclmuldq'/>
      <feature name='pbe'/>
      <feature name='tm'/>
      <feature name='ht'/>
      <feature name='ss'/>
      <feature name='acpi'/>
      <feature name='ds'/>
      <feature name='vme'/>
    </cpu>
    <power_management/>
    <migration_features>
      <live/>
      <uri_transports>
        <uri_transport>tcp</uri_transport>
      </uri_transports>
    </migration_features>
  </host>

</capabilities>

$ virsh --version
0.9.11


$ qemu-system-x86_64 --version
QEMU emulator version 1.0,1 (qemu-kvm-1.0.1), Copyright (c) 2003-2008
Fabrice Bellard

$ sudo virsh uri
qemu:///system

$ sudo virsh version
Compiled against library: libvir 0.9.11
Using library: libvir 0.9.11
Using API: QEMU 0.9.11
error: failed to get the hypervisor version
error: internal error Cannot find suitable emulator for x86_64

$ which kvm
/usr/local/bin/kvm


Can someone tell me, please, what is the version of qemu-kvm which will
work well with the latest libvirt 0.9.11 ? since clearly the latest
versions of qemu-kvm and libvirt are not compatible fully (atleast not hvm).
Even better if this is documented somewhere visible so that a lot of
time can be saved in iterating through the versions of qemu-kvm to find
out which one will work.

-- 
Bhasker C V
Secure Mails:
http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x4D05FEEC54E47413

On 18/04/12 21:56, Bhasker C V wrote:
> Hi all
> 
> 
>  I have faced this issue already and the solution was to go back to a
> old version of qemu-kvm and/or libvirt and things start falling into
> place but this time I would want to solve this.
> 
> 
> I have used these versions as per the o/p of the commands below. To
> jumpstart a new machine which is libvirt capable, it always is a hastle
> to find out which of the version combination of libvirt,qemu-kvm will work.
> 
> Just by picking the latest of the two versions does not help and ends up
> not supporting hvm at all
> 
> 
> 
> $ sudo virsh capabilities
> <capabilities>
> 
>   <host>
>     <uuid>34373030-3635-435a-4a32-313230485156</uuid>
>     <cpu>
>       <arch>x86_64</arch>
>       <model>Westmere</model>
>       <vendor>Intel</vendor>
>       <topology sockets='2' cores='4'
threads='2'/>
>       <feature name='rdtscp'/>
>       <feature name='pdpe1gb'/>
>       <feature name='dca'/>
>       <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='pclmuldq'/>
>       <feature name='pbe'/>
>       <feature name='tm'/>
>       <feature name='ht'/>
>       <feature name='ss'/>
>       <feature name='acpi'/>
>       <feature name='ds'/>
>       <feature name='vme'/>
>     </cpu>
>     <power_management/>
>     <migration_features>
>       <live/>
>       <uri_transports>
>         <uri_transport>tcp</uri_transport>
>       </uri_transports>
>     </migration_features>
>   </host>
> 
> </capabilities>
> 
> $ virsh --version
> 0.9.11
> 
> 
> $ qemu-system-x86_64 --version
> QEMU emulator version 1.0,1 (qemu-kvm-1.0.1), Copyright (c) 2003-2008
> Fabrice Bellard
> 
> $ sudo virsh uri
> qemu:///system
> 
> $ sudo virsh version
> Compiled against library: libvir 0.9.11
> Using library: libvir 0.9.11
> Using API: QEMU 0.9.11
> error: failed to get the hypervisor version
> error: internal error Cannot find suitable emulator for x86_64
> 
> $ which kvm
> /usr/local/bin/kvm
Forgot to mention that kvm is symbolic linked to qemu-system-x86_64
> 
> 
> Can someone tell me, please, what is the version of qemu-kvm which will
> work well with the latest libvirt 0.9.11 ? since clearly the latest
> versions of qemu-kvm and libvirt are not compatible fully (atleast not
hvm).
> Even better if this is documented somewhere visible so that a lot of
> time can be saved in iterating through the versions of qemu-kvm to find
> out which one will work.
> 

-- 
Bhasker C V
Secure Mails:
http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x4D05FEEC54E47413