Re: [Xen-users] Run KVM guest on Xen

[Roger Pau Monné <roger.pau@xxxxxxxxxx>]

On Fri, Dec 09, 2016 at 03:38:23PM +0000, Charles Gonçalves wrote:
> I have a lot of KVM guests that run a big benchmark that I had to port to
> Xen for my PHD experiments. I'm trying to test the migration of KVM guests
> to Xen to see if I avoid to reconfiguring all the system.
> 
> Does anyone have successfully made this kind of migration?
> 
> On my tests I couldn't make it work!
> 
> Created and KVM guest using libvirt that used qcow disks and have the
> following configuration :
> 
> <domain type='kvm'>
>   <name>test</name>
>   <uuid>8b86300d-8279-453e-88c3-958a10182597</uuid>
>   <memory unit='KiB'>524288</memory>
>   <currentMemory unit='KiB'>524288</currentMemory>
>   <vcpu placement='static'>1</vcpu>
>   <os>
>     <type arch='x86_64' machine='pc-i440fx-xenial'>hvm</type>
>     <boot dev='hd'/>
>   </os>
>   <features>
>     <acpi/>
>     <apic/>
>     <pae/>
>   </features>
>   <clock offset='utc'/>
>   <on_poweroff>destroy</on_poweroff>
>   <on_reboot>restart</on_reboot>
>   <on_crash>destroy</on_crash>
>   <devices>
>     <emulator>/usr/bin/kvm-spice</emulator>
>     <disk type='file' device='disk'>
>       <driver name='qemu' type='qcow2'/>
>       <source file='/var/lib/uvtool/libvirt/images/test.qcow'/>
>       <target dev='vda' bus='virtio'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x04'
> function='0x0'/>
>     </disk>
>     <disk type='file' device='disk'>
>       <driver name='qemu' type='raw'/>
>       <source file='/var/lib/uvtool/libvirt/images/test-ds.qcow'/>
>       <target dev='vdb' bus='virtio'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x05'
> function='0x0'/>
>     </disk>
>     <controller type='usb' index='0'>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x01'
> function='0x2'/>
>     </controller>
>     <controller type='pci' index='0' model='pci-root'/>
>     <interface type='network'>
>       <mac address='52:54:00:d0:74:26'/>
>       <source network='default'/>
>       <model type='virtio'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x03'
> function='0x0'/>
>     </interface>
>     <serial type='pty'>
>       <target port='0'/>
>     </serial>
>     <console type='pty'>
>       <target type='serial' port='0'/>
>     </console>
>     <input type='mouse' bus='ps2'/>
>     <input type='keyboard' bus='ps2'/>
>     <graphics type='vnc' port='-1' autoport='yes' listen='127.0.0.1'>
>       <listen type='address' address='127.0.0.1'/>
>     </graphics>
>     <video>
>       <model type='cirrus' vram='16384' heads='1'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x02'
> function='0x0'/>
>     </video>
>     <memballoon model='virtio'>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x06'
> function='0x0'/>
>     </memballoon>
>   </devices>
> </domain>
> 
> 
> Then tryied to port the guest out of the box just changing to xen libvirt
> config file:
> 
> <domain type='xen'>
>   <name>testmig</name>
>   <uuid>8b86300d-8279-453e-88c3-958a10182597</uuid>
>   <memory unit='KiB'>524288</memory>
>   <currentMemory unit='KiB'>524288</currentMemory>
>   <vcpu placement='static'>1</vcpu>
>   <bootloader>/usr/lib/xen-4.6/bin/pygrub</bootloader>
>   <os>
>     <type arch='x86_64' machine='xenpv'>linux</type>

Machine should be xenhvm or something similar, if you want to port a KVM guest
to Xen. And then you can remove cmdline below I guess (note that I've never
used libvirt).

I don't see anything else obviously wrong in the rest of the file, although
there could be other things missing that I don't know of.

Roger.


_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxx
https://lists.xen.org/xen-users