On 07/15/2014 08:28 AM, Ravi Samji wrote: > Hi All, > > I'm having issue with creating LVM Volume via libvirt. > > We are running libvirtd 1.2 with KVM. > > We are creating Volume Group (VG01) outside of libvirt and defining a storage pool for it. > Here is the StoragePool XML for the Volume Group created outside libvirt. > <pool type="logical"> > <name>VG01</name> > <target> > <path>/dev/VG01</path> > </target> > </pool> > > We are creating Logical Volume (ub_test01.img) through libvirt in the Volume Group (VG01) > Here is the XML to create Storage Volume in LVM Storage Pool VG01. > <volume type="block"> > <name>ub_test01.img</name> > <allocation>0</allocation> > <capacity unit="M">1</capacity> If the allocation is not equal to the capacity, libvirt calls lvcreate with the --virtualsize option, which creates this snapshot that should take up less space. For a regular volume, just omit the allocation element, or use the same values for both. > <target> > <format type="lvm2" /> > </target> > </volume> > > When I create the Logical Volume from libvirt using above XML and run lvs command to list logical volumes, this is what I see. > > LV VG Attr LSize Origin Snap% Move Log Copy% Convert > --------------- ------- ------- ------- ----------------------- ------- ------- ------- ------- ------- > foo VG01 -wi-a- 1.00g > ub_test01.img VG01 swi-a- 4.00m [ub_test01.img_vorigin] 0.20 > root ops-02 -wi-ao 227.08g > swap_1 ops-02 -wi-ao 5.75g > > > As you see, ub_test01.img shows that it has an Origin indicating that it was created as a snapshot, but, that Origin doesn't exist and wasn't specified. > > I'd appreciate if you anyone can help me understand what is going on and/or describe how to make libvirt create logical volumes not as a snapshot. > > I'm happy to enable debugging to see what command libvirt is running to create the volume if someone case describe how to enable debugging. See http://libvirt.org/logging.html Jan
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