Feature pages are design documents that developers have created while collaborating on oVirt.

Most of them are outdated, but provide historical design context.

They are not user documentation and should not be treated as such.

Documentation is available here.

CentOS Stream 9 support


Add support for CentOS Stream 9 to oVirt project


Current Status

  • Last updated: Mon Oct 04 2021 Sandro Bonazzola
  • Target release: oVirt 4.5.0
  • Status: in progress
  • Reference bugs:
    • Bug 1986335 - [RFE] Support hosts based on CentOS Stream 9
    • Bug 1990767 - [RFE] Support oVirt Engine on CentOS Stream 9

Detailed Description

  • [50 %] CI - Support building oVirt project packages on CentOS Stream 9.
    • Automation for builiding oVirt Node and its dependencies is in place.
    • Missing automation for building oVirt Engine and its dependencies.
  • [0 %] CI - Add automation for building and testing oVirt project packages on CentOS Stream 9.
  • [0 %] Engine: Support clusters with CentOS Stream 9 based hosts.
  • [90%] Host: provide oVirt Node based on CentOS Stream 9 and allow provisioning equivalent host based on CentOS Stream 9 or derivatives.
  • Not a goal for this feature but nice to have: oVirt Engine running on CentOS Stream 9 as well.



Due to the move from Ansible 2.9 to Ansible 2.11 the oVirt Hosted Engine Setup flow needs to be re-designed as Ansible 2.11 requires to be executed within a container.

Benefit to oVirt

oVirt will be able to run on top of CentOS Stream 9 and RHEL 9 once it will be available.

Entity Description

In CentOS Stream 9, RHEL 7 emulated machine are going to be unsupported. VDSM should report the host to be not compatible with cluster level < 4.4.


No CRUD operation needed in oVirt Engine.

User Experience

No UX change needed in oVirt Engine.


Both ovirt-engine host/appliance and ovirt-node/hosts will require full re-install when upgrading from CentOS Stream 8 or derivatives.

We are not considering in-place upgrade in this design.

Event Reporting

No event reporting updates needed.

Dependencies not provided by CentOS Stream 9 repositories are handled within CentOS Virtualization SIG or within a repository managed by oVirt project.

The ovirt-release-master package will provide the needed repository configuration.

On a plain CentOS Stream 9 system you can install the oVirt packages and their dependencies following the Install nightly snapshot guide.

Documentation & External references

  • CentOS Stream 9 is now available at


  • Running same testing previously executed on CentOS Stream 8 hosts.

Contingency Plan

If we can’t complete CentOS Stream 9 host support, packages won’t be shipped.

Release Notes

oVirt can now be deployed on CentOS Stream 9 and derivatives based hosts.

Open Issues

Newly-discovered issues will be tracked in bugzilla, as dependencies of the tracker Bugs:

  • Bug 1986335 - [RFE] Support hosts based on CentOS Stream 9
  • Bug 1990767 - [RFE] Support oVirt Engine on CentOS Stream 9