This script is a part of the soap server of dtc-xen running over https with auth.
dtc-xen-volgroup
dtc-xen-volgroup This shell script is a part of the dtc-xen package that is to be used by the dtc panel to manage a Xen VPS server. It determines the name of the last volume group seen in the list of active volume groups, in order to create partitions for your VPS and avoid a painful configuration of your server. If you do not want that dtc-xen auto-determines the volume group for your VPS, as you have more than one in your system, then you can edit /etc/dtc-xen/dtc-xen.conf in order to override this script.