At 2017-04-26 21:59:46, "Daniel P. Berrange" <berrange@redhat.com> wrote:
>On Wed, Apr 26, 2017 at 08:51:39AM -0500, Eric Blake wrote:
>> > 
>> > I migrated a Windows 7 VM with libvirtd tunnelled, the VM halted
>> > on the target although the status is running.
>
>What do you mean by halted ? The guest OS has shutdown, or QEMU
>has crashed, or something else ?
>
>> > 
>> > 
>> >     [root@test15 ~]# virsh migrate --live --p2p --tunnelled i-000000ac qemu+tcp://192.168.65.13/system
>> > 
>> > 
>> > But when migrated with qemu native mode, the VM runs well.
>> > 
>> > 
>> >     [root@test15 ~]# virsh migrate --live --p2p i-000000ac qemu+tcp://192.168.65.13/system
>
>From QEMU's POV there's no difference between these modes - in both cases
>QEMU is just getting a file descriptor from libvirt.
>
>So any problems with the guest after migration are 
>
>> > System Info:
>> >     Release: Centos 7.2
>> >     Kernel: 3.10.0-327.28.3.el7.x86_64
>> >     Qemu: qemu-kvm-rhev-2.3.0
>> >     Libvirt: libvirt-1.2.17/libvirt-2.0.0
>
>Does the 2 libvirt versions mean you are live-migrating between two different
>versions of CentOS ?  If so, this also likely means two different versions
>of QEMU involved.
>

Migrate between 2 same version, and tried to upgrade the libvirt version.

>> >     CPU: AMD Opteron(TM) Processor 6212
>> > 
>> > 
>> > As CPUFrequency may lead windows migrate halt, I have disabled Power Management. 
>> > 
>> > 
>> > Does anyone have some sugestions?
>> > 
>> > 
>> > Thanks,
>> > Linwen Deng
>> > 
>> > 
>> > vm.xml
>> > 
>> > 
>> > <domain type='kvm' id='8'>
>> >   <name>i-000000ac</name>
>> >   <uuid>53f0710f-b25e-4f47-a7cf-c15a9409fdc3</uuid>
>> >   <metadata>
>> >     <nova:instance xmlns:nova="http://openstack.org/xmlns/libvirt/nova/1.0">
>> >       <nova:package version="12.0.0-4"/>
>> >       <nova:name>c7-vm15-test15-7</nova:name>
>> >       <nova:creationTime>2017-04-14 06:48:54</nova:creationTime>
>> >       <nova:flavor name="oeflavor-4-2048-20">
>> >         <nova:memory>2048</nova:memory>
>> >         <nova:disk>20</nova:disk>
>> >         <nova:swap>0</nova:swap>
>> >         <nova:ephemeral>0</nova:ephemeral>
>> >         <nova:vcpus>4</nova:vcpus>
>> >       </nova:flavor>
>> >       <nova:owner>
>> >         <nova:user uuid="b0f21b1d16b147ffb3f7713716cc894a">admin</nova:user>
>> >         <nova:project uuid="ae883f160c3c41db850d5cde8de8208b">service</nova:project>
>> >       </nova:owner>
>> >     </nova:instance>
>> >   </metadata>
>> >   <memory unit='KiB'>2097152</memory>
>> >   <currentMemory unit='KiB'>2097152</currentMemory>
>> >   <memoryBacking>
>> >     <hugepages>
>> >       <page size='2048' unit='KiB' nodeset='0'/>
>> >     </hugepages>
>> >   </memoryBacking>
>> >   <vcpu placement='static'>2</vcpu>
>> >   <cputune>
>> >     <shares>4096</shares>
>> >     <vcpupin vcpu='0' cpuset='4-7'/>
>> >     <vcpupin vcpu='1' cpuset='4-7'/>
>> >     <emulatorpin cpuset='4-7'/>
>> >   </cputune>
>> >   <resource>
>> >     <partition>/machine</partition>
>> >   </resource>
>> >   <sysinfo type='smbios'>
>> >     <system>
>> >       <entry name='manufacturer'>Fedora Project</entry>
>> >       <entry name='product'>OpenStack Nova</entry>
>> >       <entry name='version'>12.0.0-4</entry>
>> >       <entry name='serial'>95637afe-453f-42a8-b198-df673ab59c91</entry>
>> >       <entry name='uuid'>53f0710f-b25e-4f47-a7cf-c15a9409fdc3</entry>
>> >       <entry name='family'>Virtual Machine</entry>
>> >     </system>
>> >   </sysinfo>
>> >   <os>
>> >     <type arch='x86_64' machine='pc-i440fx-rhel7.2.0'>hvm</type>
>> >     <boot dev='cdrom'/>
>> >     <boot dev='hd'/>
>> >     <boot dev='fd'/>
>> >     <smbios mode='sysinfo'/>
>> >   </os>
>> >   <features>
>> >     <acpi/>
>> >     <apic/>
>> >   </features>
>> >   <cpu mode='host-model'>
>> >     <model fallback='allow'/>
>> >     <topology sockets='2' cores='1' threads='1'/>
>> >   </cpu>
>> >   <clock offset='utc'>
>> >     <timer name='pit' tickpolicy='delay'/>
>> >     <timer name='rtc' tickpolicy='catchup'/>
>> >     <timer name='hpet' present='no'/>
>> >   </clock>
>
>If nothing else, this guest is incorrectly configured for running
>the Windows OS. I suspect you forget to set the Glance image
>property needed to tell Nova that it is windows.
>
>Specifically it is missing hyperv paravirt <timer>, and many hyperv
>paravirt <feature> elements.
>
>This will make Windows guests unstable and liable to hit BSOD
>

I have tried to update the xml, the problem also exists, although there's one
success in 5 tries. But the guest can accept ctrl-alt-delete, further operations still not available. 

 <features>
    <acpi/>
    <apic/>
    <hyperv>
      <relaxed state='on'/>
      <vapic state='on'/>
      <spinlocks state='on' retries='8191'/>
    </hyperv>
  </features>
  <cpu mode='host-model'>
    <model fallback='allow'/>
    <topology sockets='1' cores='2' threads='1'/>
  </cpu>
  <clock offset='utc'>
    <timer name='pit' tickpolicy='delay'/>
    <timer name='rtc' tickpolicy='catchup'/>
    <timer name='hpet' present='no'/>
    <timer name='hypervclock' present='yes'/>
  </clock>


>
>Regards,
>Daniel
>-- 
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