Example migration from iSCSI backed storage host to other host with local LVM based storage.
multipath -ll vmns2 vmns2 (3600140548f12334da9fed3985da3d6df) dm-14 SYNOLOGY,iSCSI Storage size=64G features='0' hwhandler='0' wp=rw `-+- policy='round-robin 0' prio=1 status=active |- 6:0:0:17 sdo 8:224 active ready running `- 7:0:0:17 sdaf 65:240 active ready running
virsh shutdown ns2
fdisk -l /dev/mapper/vmns2 Disk /dev/mapper/vmns2: 68.7 GB, 68719476736 bytes dd if=/dev/mapper/vmns2 bs=1M | pv -s 68719476736 | gzip -c > /var/tmp/ns2-disk-backup.img.gz
dd if=/dev/mapper/vmdesktop bs=1M | pv -s 17179869184 | gzip -c | ssh -c arcfour benst@kvm1 'cat - > /var/tmp/desktop-disk-image.gz'
virsh dumpxml ns2 > /tmp/ns2.xml
virsh define /tmp/ns2.xml
lvcreate -L 64G -n vmns2 vg_kvm1
gunzip -c ns2-disk-backup.img.gz | pv -s 68719476736 | dd of=/dev/vg_kvm1/vmns2 bs=1M 64GB 0:14:05 [77.5MB/s] [================================>] 100% 134217728+0 records in 134217728+0 records out 68719476736 bytes (69 GB) copied, 851.545 s, 80.7 MB/s
virsh start vmns2
virsh autostart --disable ns2
virsh autostart vmns2
qemu-img convert -O qcow2 /dev/vg_name/lv_name/ /var/lib/libvirt/images/image_name.qcow2
virsh edit image_name
driver name='qemu' type='qcow2' source file='/var/lib/libvirt/images/image_name.qcow2'
qemu-img convert -c -O qcow2 source.qcow2 shrunk.qcow2