oVirt Backup and Recovery

Data security and recovery are critical when dealing with virtualization platforms. In the event of an outage or disaster, businesses must be able to restore virtual machines (VMs) and critical data efficiently. While oVirt provides tools for managing virtualized environments, organizations need a dedicated backup solution to protect workloads and support reliable recovery.

This article explores what oVirt is, how its architecture works, and how Storware Backup and Recovery can protect oVirt virtual machines.

What is oVirt?

oVirt is an open-source virtualization management platform built around the Kernel-based Virtual Machine (KVM) hypervisor.

With a web-based interface, the platform provides centralized administration, allowing users to manage compute, storage, networking resources, and virtual machines.

oVirt is designed to support different deployment sizes and integrates with other open-source projects, including Ansible for automation and storage technologies used in virtualized environments. Its API also enables integration with external management and data protection tools.

oVirt is an upstream open-source project related to other virtualization platforms, including Red Hat Virtualization (RHV) and Oracle Linux Virtualization Manager (OLVM). However, these products have their own release cycles, support policies, and compatibility requirements. Their features and lifecycle should therefore be checked against their respective official documentation.

Components of oVirt

The oVirt architecture consists of the management engine, virtualization hosts, and storage infrastructure. Together, these components provide a centralized environment for managing virtual machines.

StorageoVirt supports storage infrastructure that provides virtual machine disks and related data. Storage can be based on file or block technologies and may be accessed locally or remotely, depending on the deployment. Storage domains organize resources used by virtual machines and support the storage requirements of the virtualized environment.

oVirt EngineThe oVirt Engine is the central management component. It provides the web interface and API used to deploy, start, migrate, and monitor virtual machines and to manage hosts, networks, and storage.

HostsHosts run virtual machines using the KVM hypervisor. They use components such as VDSM (Virtual Desktop and Server Manager) and libvirt to manage virtual machines and interact with the management engine. Supported host operating systems and deployment methods depend on the oVirt release.

The Latest oVirt Release Features

The latest release in the oVirt 4.5 series is oVirt 4.5.7, announced on January 13, 2026. It includes updates to the platform, bug fixes, security improvements, and compatibility changes.

The release introduces or updates support for newer operating system environments, including CentOS Stream 10 and AlmaLinux 10. It also includes improvements to host management, virtual machine operations, and platform dependencies.

The supported operating systems and deployment options depend on the component being installed. The oVirt project lists supported options for the Engine and hosts, including RHEL 9 and RHEL 10, CentOS Stream 9 and CentOS Stream 10, as applicable to the relevant deployment.

There are also important lifecycle considerations for existing installations:

• CentOS Stream 8 is no longer supported by the oVirt project.
• Users of oVirt Node NG should review the project’s guidance and consider an alternative deployment method.
• Compatibility should be verified before upgrading an existing environment, particularly when using third-party integrations or backup software.

For the complete release notes and current compatibility information, see the official oVirt 4.5.7 release announcement.

Key Features of oVirt 4.5.7

he oVirt 4.5.7 release includes updates across several areas of the platform:

• Operating System Support: The release adds support for newer operating system environments, including CentOS Stream 10 and AlmaLinux 10, and updates the supported deployment options.
• Security Updates: The release includes security fixes and dependency updates. Administrators should consult the official release notes for details relevant to their environment.
• Host Management Improvements: Updates improve aspects of host management, including host reconnection after a reboot.
• Virtual Machine Improvements: The release includes fixes and improvements affecting virtual machine operations and management.
• Component and Dependency Updates: Various platform components and dependencies have been updated as part of the release.

For a complete list of changes, consult the official oVirt 4.5.7 release notes.

oVirt as a Basis for Red Hat Virtualization and Oracle Linux Virtualization Manager

oVirt has served as an upstream open-source project for virtualization technologies related to Red Hat Virtualization (RHV) and Oracle Linux Virtualization Manager (OLVM). Although these platforms share technology with oVirt, they are separate products with their own support policies, release cycles, and compatibility requirements.

Red Hat Virtualization (RHV) is based on oVirt technology and was offered as a virtualization platform with Red Hat enterprise support. Organizations still running RHV should consult Red Hat’s official lifecycle and support documentation when planning maintenance, upgrades, or migration.

Oracle Linux Virtualization Manager (OLVM) is Oracle’s virtualization management platform based on related oVirt technology. Its supported configurations and lifecycle are defined by Oracle. Organizations using OLVM should refer to Oracle’s documentation when verifying compatibility and support.

The relationship between these platforms does not mean that every oVirt update or feature is automatically available in RHV or OLVM. Always verify the documentation for the specific product and version in use.

oVirt Backup and Recovery

Backup and recovery are critical components of any virtualization strategy. In an enterprise environment, reliable backups help protect virtual machines against accidental deletion, data corruption, infrastructure failures, and other incidents.

Storware Backup and Recovery integrates with oVirt to protect virtual machines without requiring a backup agent inside every guest operating system. It offers different backup strategies to accommodate the environment’s configuration, performance requirements, and supported oVirt version.

Understanding Backup Modes

When using Storware Backup and Recovery with oVirt 4 or later, several backup strategies are available. The appropriate method depends on the oVirt version, configuration, and requirements.

1. Disk AttachmentThis method uses a proxy virtual machine to access virtual machine disks for backup processing. It can provide high throughput and is useful when performance is a priority. The proxy VM and Storware Node components must be deployed and configured according to the environment’s requirements.
2. Disk Image TransferThis method transfers virtual machine disk data through the oVirt management interfaces. It can support full and incremental backup workflows, depending on the oVirt version and configuration, without requiring a dedicated proxy VM for every cluster.
3. Change Block Tracking (CBT)Change Block Tracking identifies disk blocks that have changed since a previous backup, allowing incremental backups to transfer only the relevant data. This can reduce backup time and storage consumption. CBT support depends on the oVirt version and compatible versions of components such as libvirt, qemu-kvm, and VDSM.
4. SSH TransferSSH Transfer is another available strategy for transferring virtual machine data. Its suitability depends on the environment and the supported configuration.

Legacy environments may also use the Export Storage Domain method through the older oVirt API v3. This should be treated as a legacy option rather than the default choice for new deployments.

For more information about the available methods and their requirements, see Storware’s guide to backup strategies for oVirt VMs.

Additional Backup and Recovery Capabilities

In addition to backup strategies, Storware Backup and Recovery provides capabilities designed to simplify data protection and recovery for oVirt environments. Availability may depend on the selected method, configuration, and supported versions.

• Full and Incremental Backups: Protect virtual machines using full backups and, where supported, incremental backup methods.
• Agentless Protection: Back up virtual machines through integration with oVirt rather than requiring a dedicated backup agent in every guest.
• Application-Consistent Snapshots: When a compatible guest agent is available and configured, the backup workflow can use filesystem freeze operations to help create a consistent snapshot. Otherwise, a regular snapshot may be used.
• Instant Restore: Start a virtual machine from backed-up data to reduce the time needed to make a workload available. The supported workflow and destination requirements should be verified for the target environment.
• Granular Recovery Options: Depending on the backup and storage configuration, recovery options include restoring a virtual machine, recovering individual files from mountable backups, and accessing backed-up disks through supported mechanisms.
• oVirt UI Integration: The Storware integration can provide backup and restore operations from the oVirt interface, including policy-based protection and on-demand actions.
• Automation and Integration: Storware supports API and command-line workflows, as well as custom command execution for application-related backup tasks.

For the most accurate information about supported oVirt versions, backup methods, and configuration requirements, consult the Storware oVirt solution page and the Storware documentation.

A Note on Best Practices

For the best possible backup and recovery experience, keep the oVirt environment on a supported release and follow the official project’s guidance for operating system compatibility, security updates, and upgrades.

Before upgrading, verify compatibility between the oVirt release, its hosts and storage infrastructure, and the Storware backup configuration. Regularly test recovery procedures to confirm that virtual machines and their data can be restored within the required recovery time.

Ready to protect your data?

Storware Backup and Recovery helps protect virtualized workloads and provides recovery options for oVirt environments. To discuss your requirements and find the right configuration for your infrastructure, book a demo.

Conclusion

oVirt provides a flexible, open-source platform for managing KVM-based virtualized environments. However, virtualization management alone does not replace a dedicated backup and recovery solution.

Storware Backup and Recovery integrates with oVirt to support virtual machine protection through multiple backup strategies, including Disk Attachment, Disk Image Transfer, SSH Transfer, and Change Block Tracking where supported. Additional capabilities can help organizations recover virtual machines and files, automate data protection, and reduce recovery time.

The right approach depends on the oVirt version, infrastructure configuration, and recovery requirements. By verifying compatibility, selecting an appropriate backup strategy, and regularly testing restores, organizations can strengthen the resilience of their virtualized environments.