4.3. Red Hat Virtualization 4.2 Batch Update 2 (ovirt-4.2.5)

4.3.1. Enhancements

This release of Red Hat Virtualization features the following enhancements:


The new boot_hostdev hook allows virtual machines to boot from passed through host devices such as NIC VF's, PCI-E SAS/RAID Cards, SCSI devices for example without requiring a normal bootable disk from a Red Hat Virtualization storage domain or direct LUN.


This release introduces a new `rhv-log-collector-analyzer --live` tool that creates an HTML analysis of your Red Hat Virtualization deployment. It list major entities and warns of common issues, mostly focused on pre-upgrade action items.


This update adds support for IBM POWER9 hypervisors with RHEL-ALT and POWER9 guests. It also adds support for POWER8 guests on a POWER9 hypervisor and live migration of POWER8 guests between POWER8 and POWER9 hypervisors.


This feature adds static routes support to ovirt-provider-ovn, as specified in

The appropriate REST request for this is as follows:
"router": {
  "routes": [
      "destination": "",
       "nexthop": ""


This update adds a secure AMD EPYC CPU variant for CVE-2018-3639, called "AMD EPYC IBPB SSBD".


This update adds a feature to control pop up notifications. Once 3 or more notifications are showing, "Dismiss" and "Do not disturb" buttons will appear that allow the user to silence notifications.

4.3.2. Release Notes

This section outlines important details about the release, including recommended practices and notable changes to Red Hat Virtualization. You must take this information into account to ensure the best possible outcomes for your deployment.


There were inconsistencies in the following internal configuration options:

* HotPlugCpuSupported
* HotUnplugCpuSupported
* HotPlugMemorySupported
* HotUnplugMemorySupported
* IsMigrationSupported
* IsMemorySnapshotSupported
* IsSuspendSupported
* ClusterRequiredRngSourcesDefault

If you are having issues with these features, upgrade to Red Hat Virtualization 4.2.5+ to resolve the problem.