The oVirt project is excited to announce the availability of oVirt 4.5.0 Alpha release for testing , as of March 16th, 2022.


This release unleashes an altogether more powerful and flexible open source virtualization solution that encompasses hundreds of individual changes and a wide range of enhancements across the engine, storage, network, user interface, and analytics on top of oVirt 4.4.

Important notes before you try it

Please note this is an Alpha release.

The oVirt Project makes no guarantees as to its suitability or usefulness.

This pre-release must not be used in production, and it is not feature complete.

In particular, please note that upgrades from 4.4 and future upgrades from this alpha to the final 4.5 release from this version are not supported.

Some of the features included in oVirt 4.5.0 Alpha require content that will be available in RHEL 8.6 and derivatives which are currently included in CentOS Stream 8.


Be sure to follow instructions for oVirt 4.5!

  • If you want to try oVirt as quickly as possible, follow the instructions on the Download page.
  • For complete installation, administration, and usage instructions, see the oVirt Documentation.
  • For upgrading from a previous version, see the oVirt Upgrade Guide.
  • For a general overview of oVirt, see About oVirt.

What’s new in oVirt 4.5.0 Alpha Release?

This update is the ninth in a series of stabilization updates to the 4.4 series.


This release is available now on x86_64 architecture for:

  • CentOS Stream 8


This release supports Hypervisor Hosts on x86_64:

  • oVirt Node NG (based on CentOS Stream 8)
  • CentOS Stream 8


Builds are also available for ppc64le and aarch64.


Experimental builds for CentOS Stream 9 are also provided for Hypervisor Hosts.


Some of the RFEs with high user impact are listed below:

  • 1926625 [RFE] How to enable HTTP Strict Transport Security (HSTS) on Apache HTTPD for Red Hat Virtualization Manager
  • 1933555 [RFE] Release python-ovirt-engine-sdk4 package on RHEL 9
  • 1740427 [RFE] Provide SCSI reservation support for virtio-scsi via rhev-guest-tools for Windows 2016 and Windows 2019 guests using Direct-Lun as disks
  • 1849169 [RFE] add virtualCPUs/physicalCPUs ratio property to evenly_distributed policy
  • 1782056 [RFE] Integration of built-in ipsec feature in RHV/RHHI-V with OVN
  • 1624015 [RFE] Expose Console Options and Console invocation via API
  • 1998255 [RFE] [UI] Add search box for vNIC Profiles in RHVM WebUI on the main vNIC profiles tab
  • 1927985 [RFE] Speed up export-to-OVA on NFS by aligning loopback device offset
  • 2058177 [RFE] Include the package nvme-cli on virtualization hosts
  • 2021217 [RFE] Windows 2022 support
  • 1986775 [RFE] introduce support for CentOS Stream 9 on oVirt releases
  • 1990462 [RFE] Add user name and password to ELK integration
  • 1998866 [RFE] Windows 11 support
  • 1838089 [RFE] Please allow placing domain in maintenance mode with suspended VM
  • 1975720 [RFE] Huge VMs require an additional migration parameter
  • 1997893 [RFE] Prefer UEFI for new VMs
  • 1913389 [CBT] [RFE] Minimize scratch disk initial size
  • 1964241 [RFE][CBT][Veeam]Allow providing the created backup ID when starting a VM backup


Some of the Bugs with high user impact are listed below:

  • 1986732 ovirt-ha services cannot set the LocalMaintenance mode in the storage metadata and are in a restart loop
  • 2035051 removing nfs-utils cause ovirt-engine removal due to cinderlib dep tree
  • 2054745 Setting SD to maintenance fails and turns the SD to inactive mode as a result
  • 1878724 vdsm-tool configure is failing with error “dependency job for libvirtd.service failed”
  • 2024698 build failure in copr
  • 2040402unable to use –log-size=0 option
  • 2024161 Penalizing score by 1000 due to cpu load is not canceled after load decreasing to 0
  • 1986731 ovirt-engine uses deprecated API platform.linux_distribution which has been removed in Python 3.7 and later.
  • 1986728 ovirt-log-collector uses deprecated API platform.linux_distribution which has been removed in Python 3.7 and later.
  • 2019869 Local disk is not bootable when the VM is imported from OVA
  • 1986485 otopi uses deprecated API platform.linux_distribution which has been removed in Python 3.7 and later.
  • 2022541 unable to select iscsi luns
  • 1787192 Host fails to activate in RHV and goes to non-operational status when some of the iSCSI targets are down
  • 2006721 uploading image using ovirt_disk always fails for the first time and works in second attempt
  • 2020497 Need to include lvm2-2.03.14-1.el8
  • 1899821 RHVH 4.4.3 anaconda UI proceeds to begin installation without root password provided
  • 2025936 metrics configuration playbooks failing due to rhel-system-role last refactor


oVirt Node has been updated, including:

  • CentOS Stream 8 latest updates


oVirt Appliance has been updated, including:


See the release notes for installation instructions and a list of new features and bugs fixed.


Additional resources:


oVirt 4.5.0 Alpha test day – March 17th 2022


If you’re willing to help testing the release during the test days please join the oVirt development mailing list at and report your feedback there.

Please join the trello board for sharing what you’re going to test so others can focus on different areas not covered by your test.

If you don’t want to register to trello, please share on the oVirt development mailing list and we’ll add it to the board.

The board is publicly visible also to non-registered users.

Instructions for installing oVirt 4.5.0 Alpha and oVirt 4.5.0 Beta for testing will be added to the release page when the corresponding version will be released.


Professional Services, Integrators and Backup vendors: please plan a test session against your additional services, integrated solutions,

downstream rebuilds, backup solution accordingly.

If you’re not listed here:

consider adding your company there.


If you’re willing to help updating the localization for oVirt 4.5.0 please follow


If you’re willing to help promoting the oVirt 4.5.0 release you can submit your banner proposals for the oVirt home page and for the

social media advertising at

As an alternative please consider submitting a case study as in


Feature owners: please start planning a presentation of your feature for oVirt Youtube channel:

If you have some new feature requiring community feedback / testing please add your case under the “Test looking for volunteer” section.


Do you want to contribute to getting ready for this release?

Read more about oVirt community at and join the oVirt developers