Package: libvirt-clients
Version: 1.2.9-9
Non-standard block devices may be used as disk for xen using
/etc/xen/scripts/block-xxx scripts. In my case, I'm using a special lvm
driver block-lvm
With old xm configurations, it was possible to specify
disk=["lvm:vg/lv,xvda1,w"]
xl won't like this, but specifying "disk=["phy:vg/lv,
xvda1,w,script=block-lvm"] will happily bring up the disk device using
that script. I found this digging in xen-4.4.1/tools/libxl/libxlu_disk_l.l
As an alternative, replacing block-iscsi and specifying
disk=["iscsi:vg/lv,xvda1,w"] works as well, although deprecated (as of
libxlu_disk_l.l).
For virsh, there seems to be no way to specify the script for a disk
device in the domxml (similar to the <script/> tag for interfaces), so
virsh can't create the domU. Creating an xml using domxml-from-native
will result in
<disk type='file' device='disk'>
<driver name='iscsi'/>
<source file='vg/lv'/>
<target dev='xvda1' bus='xen'/>
</disk>
but virsh create will result in "libxenlight does not support disk
driver iscsi" (which is wrong; same with drbd).
