UCS 2.4 - Univention

6.3 Managing virtual machines with UVMM
• In UCS systems installed under Xen or KVM, a paravirtualised access is automatically activated via
the profile.
• In Windows systems installed under Xen, no UVMM configuration adaptations are necessary; in this
case, Windows drivers merely need to be subsequently installed on the machine. (See [14])
• In Windows systems installed under KVM, paravirtualisation must be activated before beginning the
Windows installation, see [14] and Section 6.3.2.
6.3 Managing virtual machines with UVMM
The Univention Management Console module Virtual machines (UVMM) offers the possibility to create,
edit and delete virtual instances/machines and to change their status. In principle, these functions are
independent of the virtualisation technology employed (Xen or KVM), however they may vary slightly de-
pending on the hypervisor in use. The items that must be observed are illustrated in the following section
on the description of the functions.
Once the UMC module has been opened, a tree structure is displayed on the left-hand side, which gives
an overview of the existing virtualisation servers and the virtual instances defined there.
All the other entries in the tree structure can also be selected. If a virtualisation server is selected, an
overview showing the status of the server itself and the existing virtual instances with CPU utilisation and
memory requirements is listed. This overview can be seen in Figure 6.1. The Refresh button which can
be seen in the top right can be used to refresh the information.
Figure 6.1: Overview of a virtualisation server
When selecting a virtual machine, the status can be seen from the symbol in the tree structure, i.e.,
whether it is running, paused or stopped. As can be seen in Figure 6.2, the configurations are also shown
in addition to the statistics when a virtual instance is selected. All the settings of the instance can be
changed and saved here.
6.3.1 Creating a virtual instance
Virtual machines can be created in just a few steps in UVMM using a wizard.
171