Which block devices are you exporting to your guest? Post the libvirt
configuration file for it.
See below. It's specifically the second volume group that collides between virtual and physical systems. Both dom0 and U have identical VolGroup00 VGs, but these do not collide.
Renaming the VG used by the domU within the domU removes the collision, but the newly-renamed VG still shows up in dom0 as a useable VG with space to be allocated.
Here is the pvdisplay output from dom0. Interestingly, it shows /dev/VolGroup01/lv-sys1-data as "physical volume" when it's obviously just an LV in the original VolGroup01 VG. And this only happens with the _second_ Volume Group created. VolGroup00 is not an issue on this or any other systems I've used:
[root@iain2 qemu]# pvdisplay
--- Physical volume ---
PV Name /dev/VolGroup01/lv-sys1-data
VG Name vg-sys1
PV Size 40.00 GB / not usable 4.00 MB
Allocatable yes (but full)
PE Size (KByte) 4096
Total PE 10239
Free PE 0
Allocated PE 10239
PV UUID FTA4QU-ydZ7-e2Yy-nBsi-t4st-3jj7-IAkQH8
--- Physical volume ---
PV Name /dev/sda3
VG Name VolGroup00
PV Size 39.06 GB / not usable 29.77 MB
Allocatable yes (but full)
PE Size (KByte) 32768
Total PE 1249
Free PE 0
Allocated PE 1249
PV UUID tTViks-3lBM-HGzV-mnN9-zRsT-fFT0-ZsJRse
--- Physical volume ---
PV Name /dev/sda2
VG Name VolGroup01
PV Size 240.31 GB / not usable 25.75 MB
Allocatable yes
PE Size (KByte) 32768
Total PE 7689
Free PE 5129
Allocated PE 2560
PV UUID ZE5Io3-WYIO-EfOQ-h03q-zGdF-Frpa-tm63fX
[root@iain2 qemu]# cat sys1.xml
<domain type='kvm'>
<name>sys1</name>
<uuid>37f34394-d380-d2c4-ac37-3263c16028ff</uuid>
<memory>524288</memory>
<currentMemory>524288</currentMemory>
<vcpu>1</vcpu>
<os>
<type arch='x86_64' machine='rhel5.4.0'>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>restart</on_crash>
<devices>
<emulator>/usr/libexec/qemu-kvm</emulator>
<disk type='block' device='disk'>
<driver name='qemu' cache='none'/>
<source dev='/dev/VolGroup01/lv-sys1'/>
<target dev='vda' bus='virtio'/>
</disk>
<disk type='block' device='cdrom'>
<target dev='hdc' bus='ide'/>
<readonly/>
</disk>
<disk type='block' device='disk'>
<source dev='/dev/VolGroup01/lv-sys1-data'/>
<target dev='vdb' bus='virtio'/>
</disk>
<interface type='network'>
<mac address='54:52:00:3b:4a:f5'/>
<source network='default'/>
<model type='virtio'/>
</interface>
<serial type='pty'>
<source path='/dev/pts/3'/>
<target port='0'/>
</serial>
<console type='pty' tty='/dev/pts/3'>
<source path='/dev/pts/3'/>
<target port='0'/>
</console>
<input type='mouse' bus='ps2'/>
<graphics type='vnc' port='-1' autoport='yes' keymap='en-us'/>
</devices>
</domain>
-- -
Iain Morris
iain.t.morris@xxxxxxxxx
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