---
type: concept
title: Servervirtualisierung
tags: [virtualization, infrastructure, urz, root-server]
related: [universitatsrechenzentrum-urz, proxmox-virtual-environment, ceph-cluster, ums, groupware]
created: 2026-06-30
updated: 2026-06-30
sources: ["output/rz_uni_greifswald_de_dienste_allgemein_sonstiges.md", "output/rz_uni_greifswald_de_dienste_allgemein_sonstiges_servervirtualisierung.md"]
---
# Servervirtualisierung

**Servervirtualisierung** (Server Virtualization) is a service provided by the [[universitatsrechenzentrum-urz]] at the Universität Greifswald. 

Depending on the source documentation, the service is described as follows:
- According to the existing version on disk, it allows multiple virtual servers to run on a single physical machine, optimizing hardware utilization and flexibility.
- According to the newly generated version, it allows users to operate and administer their own root servers within a central infrastructure.

## Technical Implementation
- **Platform**: Based on [[proxmox-virtual-environment]].
- **Storage**: Disk images are stored on a [[ceph-cluster]] using [[thin-provisioning]].
- **Management**: Handled via an HTML5 WebGUI with console access.

## Access and Security
- **Network Restrictions**: Access to the primary and secondary clusters is limited to the university's internal network or via VPN.
- **Authentication**: Access to the management WebGUI is secured via [[2-factor-authentication]] using the [[ums]] second factor.

## Data Protection and Backups
- **Short-term Recovery**: [[snapshots]] are available but are automatically deleted after 7 days.
- **Long-term Recovery**: The URZ performs daily full backups of virtual machines, which are retained for 7 days.
- **Recovery Process**: Users do not have direct access to these full backups; restoration must be requested through the URZ via the [[groupware]] ticket system.