Red Hat Virtualization 4.2 Technical Notes Technical Notes for Red Hat Virtualization 4.2 and Associated Packages Last Updated: 2018-05-22 Red Hat Virtualization 4.2 Technical Notes Technical Notes for Red Hat Virtualization 4.2 and Associated Packages Red Hat Virtualization Documentation Team Red Hat Customer Content Services [email protected] Legal Notice Copyright © 2018 Red Hat, Inc. The text of and illustrations in this document are licensed by Red Hat under a Creative Commons Attribution–Share Alike 3.0 Unported license ("CC-BY-SA"). An explanation of CC-BY-SA is available at http://creativecommons.org/licenses/by-sa/3.0/ . In accordance with CC-BY-SA, if you distribute this document or an adaptation of it, you must provide the URL for the original version. Red Hat, as the licensor of this document, waives the right to enforce, and agrees not to assert, Section 4d of CC-BY-SA to the fullest extent permitted by applicable law. Red Hat, Red Hat Enterprise Linux, the Shadowman logo, JBoss, OpenShift, Fedora, the Infinity logo, and RHCE are trademarks of Red Hat, Inc., registered in the United States and other countries. Linux ® is the registered trademark of Linus Torvalds in the United States and other countries. Java ® is a registered trademark of Oracle and/or its affiliates. XFS ® is a trademark of Silicon Graphics International Corp. or its subsidiaries in the United States and/or other countries. MySQL ® is a registered trademark of MySQL AB in the United States, the European Union and other countries. Node.js ® is an official trademark of Joyent. Red Hat Software Collections is not formally related to or endorsed by the official Joyent Node.js open source or commercial project. The OpenStack ® Word Mark and OpenStack logo are either registered trademarks/service marks or trademarks/service marks of the OpenStack Foundation, in the United States and other countries and are used with the OpenStack Foundation's permission. We are not affiliated with, endorsed or sponsored by the OpenStack Foundation, or the OpenStack community. All other trademarks are the property of their respective owners. Abstract The Technical Notes document provides information about changes made between release 4.1 and release 4.2 of Red Hat Virtualization. This document is intended to supplement the information contained in the text of the relevant errata advisories available through the Content Delivery Network. Table of Contents Table of Contents .P .R . E. F. A. .C .E . .3 . .C .H . A. P. .T .E .R . .1 .. .R . H. E. .A .- 2. 0. 1. 8. :. 1. 4. 8. 8. .R .E . D. .H . A. .T . V. I.R . T. U. .A .L .I Z. .A .T .I O. .N . .M . A. N. .A . G. E. .R . (. O. V. .I R. .T .- E. N. .G . I.N .E . ). 4. ..2 . G. .A . .4 . ovirt-engine 4 RFEs 13 vdsm 14 .C .H . A. P. .T .E .R . .2 .. .R . H. E. .A .- 2. 0. 1. 8. :. 1. 4. 8. 9. .V .D . S. M. 4. ..2 . G. .A . .1 .5 . vdsm 15 .C .H . A. P. .T .E .R . .3 .. .R . H. S. .A .- 2. 0. 1. 8. :. 1. 5. 2. 4. .R .E . D. .H . A. .T . V. I.R . T. U. .A .L .I Z. .A .T .I O. .N . .H .O . S. .T . 4. ..2 . G. .A . .2 .0 . imgbased 20 ovirt-node-ng 20 redhat-release-rhev-hypervisor 21 rhev-hypervisor-ng 21 vulnerability 21 1 Red Hat Virtualization 4.2 Technical Notes 2 PREFACE PREFACE These Technical Notes provide documentation of the changes made between release 4.1 and release 4.2 of Red Hat Virtualization. They are intended to supplement the information contained in the text of the relevant errata advisories available through the Content Delivery Network. Red Hat Virtualization errata advisories are available at https://access.redhat.com/errata/. A more concise summary of the features added in Red Hat Virtualization 4.2 is available in the Red Hat Virtualization 4.2 Release Notes. 3 Red Hat Virtualization 4.2 Technical Notes CHAPTER 1. RHEA-2018:1488 RED HAT VIRTUALIZATION MANAGER (OVIRT-ENGINE) 4.2 GA The bugs in this chapter are addressed by advisory RHEA-2018:1488. Further information about this advisory is available at https://access.redhat.com/errata/RHEA-2018:1488. ovirt-engine BZ#1441322 Previously, when the Manager was restored from a backup, it sometimes tried to start a virtual machine that was already running, believing that the virtual machine was down. This resulted in a second instance of the virtual machine being started on a different host. In the current release, the virtual machine will not be restarted automatically after restoration if it is already running somewhere else. BZ#659847 You can export virtual machines as named OVF/OVA files and save them to a specific path on a host or mounted NFS shared storage. BZ#988285 The Manager supports the ability to define logical networks, ports, and subnets that are not attached to the physical interfaces of the host. This enables the virtual network interfaces to create an isolated network within Red Hat Virtualization, allowing the virtual machines to communicate among themselves. This feature is configured through the REST API and the UI. BZ#1319758 If an OVA file is accessible to at least one host in a data center, the OVA file can now be imported into the data center as a virtual machine. BZ#1372163 When live or cold merge fails, snapshot disks may be left in an illegal state. If VMs with illegal snapshot disks are shut down, they will not re- start. VMs with illegal snapshot disks are now marked with an exclamation mark and a warning message not to shut them down. BZ#1376754 Previously, if a host was placed in maintenance mode and migration was cancelled while at least 3 virtual machines were attempting to migrate to it, the host ended up in an ERROR state. In the current release, the host does not move into an ERROR state in this situation. BZ#1384321 4 CHAPTER 1. RHEA-2018:1488 RED HAT VIRTUALIZATION MANAGER (OVIRT-ENGINE) 4.2 GA Previously, if a virtual machine was shut down during a live merge, an illegal snapshot disk was created, the live merge failed, and the virtual machine did not start up. In the current release, the virtual machine can be recovered with a cold merge. BZ#1408847 Red Hat Virtualization now supports TLSv1.2. BZ#1414207 Previously, the ForceRefreshDomainFilesListByDefault parameter used by virt-viewer was set to "True" by default, sometimes causing a flood of ISO domain refresh events in the logs if many console clients were connected. In the current release, setting this parameter to "False" reduces the number of logged refresh events. BZ#1414970 Previously, the scheduler's Host Device filter policy unit did not filter for the host whose devices were to be used, excluding inappropriate hosts. Consequently, the Manager sometimes tried to run or to migrate a virtual machine with passthrough host devices to an inappropriate host. In the current release, the Host Device filter policy unit correctly filters for the host whose devices are to be used and the scheduler prevents the virtual machine from running on or migrating to an inappropriate host. BZ#1435485 Previously, when creating large pools of virtual machines, the Manager assigned duplicate MAC addresses, causing network problems. In the current release, the problem has been solved by removing a problematic legacy method. BZ#1448831 Previously, when creating a new virtual machine from a template with cloud-init configured, the virtual machine was created but the stored root password was not copied over. In the current release, the stored root password is copied to the new virtual machine. BZ#1449353 Previously, when importing a template into Red Hat Virtualization 4.2 from a storage domain that had previously been attached to an environment earlier than version 4.1, a maximum memory error occurred. In the current release, the maximum memory limitation has been fixed. BZ#1458501 5 Red Hat Virtualization 4.2 Technical Notes The REST-API now supports LLDP. See www.ovirt.org/develop/release- management/features/network/lldp/ for details. BZ#1459908 The precision of the rx_rate, tx_rate, rx_drop, and tx_drop of virtual and host network interfaces has been increased, enabling the REST API to generate more accurate network interface statistics. BZ#1467928 Previously, live merge sometimes failed during "Merge Status", "Destroy Image", or "Destroy Image Check" commands because of network timeout, leaving the top volume in an illegal state. In the current release, the system calls are repeated until they succeed, so that network timeout does not cause live merge to fail. BZ#1480433 A host must be reinstalled if you turn Kdump integration on or off, or change the kernel command line parameters. All hosts in a cluster must be reinstalled if you change the firewall type of the cluster. An exclamation mark icon in Compute > Hosts indicates that a host needs to be reinstalled. Details appear in the host's details view, in the Events tab. BZ#1490866 iptables has been deprecated in Red Hat Virtualization 4.2 and will be completely removed in version 4.3. Administrators must switch to firewalld, which is introduced in version 4.2. Otherwise, the Manager will review the clusters every 30 days and raise warning events in the audit log. A warning message has been added to engine-config help for all iptables-related settings. BZ#1509588 Previously, partial import of a virtual machine was only possible using the REST API. In the current release, an "Allow Partial" check box has been added to the Import Virtual Machine(s) window in the Manager.