Article ID: 123604, created on Nov 19, 2014, last review on Jun 17, 2016

  • Applies to:
  • Virtuozzo 6.0

Issue date: 2014-11-19

1. What's Included in This Update

The new packages for Virtuozzo 6.0 introduce new features and provide stability and usability fixes for virtual machine and Container management tools and Virtuozzo.

2. New Features

  • Attaching backups to virtual machines and Containers. To read the contents of a virtual machine or Container backup, you can attach it to a virtual machine or Container as a virtual hard disk. Currently, only local backups can be attached.

  • Updating Virtuozzo during installation from DVD. To save time, you can download and install product updates from the Parallels official repository during Virtuozzo installation. To do this, click Yes in the alert window that is shown after the installation has started but before any packages are installed.

  • Enabling and disabling Odin Customer Experience Program in Guest Tools. Now enabling or disabling CEP reports on the Hardware Node also enables or disables CEP reports in Guest Tools installed in virtual machines. To apply changes to virtual machines, restart them after changing CEP settings on the Node.

  • The vzeventd daemon for improved Container restarting. You can restart Containers from the inside using typical Linux commands, e.g., reboot or shutdown -r. Restarting is now handled by the vzeventd daemon which listens to kernel events and runs the appropriate action scripts.

  • An out-of-space message for Virtuozzo clusters not used for virtualization. If the cluster is not used for virtualization, you can mount it with the --fail-on-nospace option. In this case an ERR_NO_SPACE error will be returned if the cluster runs out of free space.

3. Bug Fixes

  • Under certain circumstances, very large Containers with enabled quotas could fail to start. (#PSBM-26464)

  • Converting a Container from VZFS to ploop could fail due to a huge diskinodes value. (#PSBM-26570)

  • Implemented remote clone operation in SDK. (#PSBM-26671)

  • Virtual machines with UEFI could fail to start if assigned more than 64256 MB of RAM. (#PSBM-26752)

  • Virtual machines on a Hardware Node with certain AMD Opteron CPUs could hang. (#PSBM-27636)

  • Under certain circumstances, backing up a virtual machine with ReiserFS could result in a Hardware Node crash. (#PSBM-27869)

  • Virtual machine's disk could become split after p2v migration to Virtuozzo. (#PSBM-28057)

  • Checking integrity of a ploop image in use could corrupt its partition table. (#PSBM-28961)

  • Under certain circumstances, migration of a virtual machine with disabled High Availability could fail. (#PSBM-29317)

  • Could not enter the colon character in Java VNC clients in the Japanese locale. (#PSBM-29449)

  • A number of other bugs (#PSBM-7525, #PSBM-20387, #PSBM-22455, #PSBM-24682, #PSBM-26347, #PSBM-26716, #PSBM-26883, #PSBM-26954, #PSBM-27286, #PSBM-27291, #PSBM-27366, #PSBM-27470, #PSBM-27531, #PSBM-27565, #PSBM-27797, #PSBM-27854, #PSBM-27864, #PSBM-27925, #PSBM-27940, #PSBM-27946, #PSBM-28109, #PSBM-28142, #PSBM-28308, #PSBM-28310, #PSBM-28363, #PSBM-28370, #PSBM-28371, #PSBM-28375, #PSBM-28514, #PSBM-28552, #PSBM-28604, #PSBM-28669, #PSBM-28826, #PSBM-29052, #PSBM-29087, #PSBM-29187, #PSBM-29349, #PSBM-29581, #PSBM-29866, #PSBM-29987).

4. Known Issues

  • The prlctl utility does not support certain parameters for Containers that were supported by vzctl in the previous versions of Virtuozzo hypervisor (formerly Parallels Server Bare Metal). To work around the problem, use the vzctl utility instead.

  • The offline management feature does not work for Containers operating in the bridged networking mode. For details, see the KB article at .

  • The offline management feature might not work for running virtual machines that operate in the bridged networking mode. The reason for this is that the destination MAC address in incoming offline management packets is changed when the packets are processed on the Virtuozzo server. As a result, the processed packets contain a source MAC address different from the destination one in incoming packets and might be dropped by your router. To solve the problem, reconfigure the router to accept packets with the same IP address but different MAC addresses. As an alternative, you can set the network adapter of a virtual machine to operate in the host-routed mode.

  • Setting encrypted passwords for containers that run Ubuntu 10.04 is not supported. To work around the problem, set the password in plain text. For more details, see .

  • Cannot establish IPsec connections from Virtuozzo Hardware Node to Containers. For more information, see .

  • Containers with multiple virtual hard disks cannot be backed up or restored via Virtual Automation or using the vzabackup/vzarestore commands.

  • Converting a Hyper-V virtual machine to a Odin virtual machine may fail. To work around the problem, use the --allow-no-os option when converting the virtual machine (#PSBM-7201).

  • You may fail to assign IPv6 addresses to virtual machines running certain Linux operating systems (e.g., CentOS 5.6). To work around the problem, enable IPv6 support in the guest operating system (e.g., by editing the /etc/modprobe.conf file). For more details, see (#PSBM-8344).

  • Creating a virtual machine in Virtuozzo 6.0 set up in a Parallels Desktop for Mac virtual machine may take a long time (#PSBM-8528).

  • Using the WMI console is not supported in Windows virtual machines that you enter with the prlctl enter command. For more information on how to work around the problem, see (#PSBM-9811).

  • A Linux virtual machine with less than 4 GB of RAM may hang on start-up. To work around the problem, use the iommu=soft option when booting the virtual machine. For details, see (#PSBM-11807).

  • Creating snapshots of a Container that has at least one prlctl enter or prlctl exec session open is not supported. To make a snapshot, close the open sessions first (#PSBM-11871).

  • Xen virtual machines cannot be migrated to Odin virtual machines (#PSBM-12122).

  • Virtuozzo may freeze a container trying to consume more disk space than you allocated to it. To solve the problem, increase the amount of disk space for the affected Container (#PSBM-12213).

  • The Bash echo command does not report an error when trying to write to a file located on a Virtuozzo storage cluster, even if the cluster does not have enough free space (#PSBM-12621).

  • Soft lockups in the Linux kernel, up to version 2.6.37, may occur on stopping virtual machines. For more information, see (#PSBM-13963).

  • Traffic shaping may not work for bridged virtual network adapters on physical servers with Open vSwitch enabled (#PSBM-14260).

  • It is impossible to use the iptables functionality on physical servers with Open vSwitch bridges enabled (#PSBM-14334).

  • On systems upgraded from Virtuozzo hypervisor 4 to Virtuozzo 6.0, prlctl list –a may not show the IP addresses of container-bridged network adapters. To view such IP addresses, use the vzlist –o IP command (#PSBM-14528).

  • Running virtual machines with Windows Server 2012 and Windows 8 is supported only on servers that have CPUs with the NX (No-eXecute) feature enabled. For details, see (#PSBM-14837).

  • Backing up a virtual machine with large virtual disks stored on an LVM partition may take a long time (#PSBM-14971).

  • Running the Iometer tool in a virtual machine with Windows and a small amount of RAM may cause the virtual machine to crash. To work around the problem, increase the amount of RAM or swap allocated to the virtual machine (#PSBM-15403).

  • The ebtables rules are flushed after restarting the ebtables service (#PSBM-15641).

  • Creating a cache with updates may fail for containers that run Red Hat Enterprise Linux 5 (#PSBM-15707).

  • Cannot migrate a physical server with a 16TB HDD running CentOS 6.4 x64 to a virtual machine (#PSBM-21244).

  • Cannot migrate a Container with over 2TB of data to a virtual machine (#PSBM-21613).

  • On 32-bit Linux guest operating systems, the maximum size of a virtual hard disk was limited to 17592186040320 bytes (16 TiB - 4 KiB) (#PSBM-22193).

  • Cannot live-migrate virtual machines and Containers with attached backups (#PSBM-29980).

5. Deprecated Features

Features considered deprecated will be removed in the next major release of Virtuozzo. They will, however, work and remain supported in Virtuozzo 6.0. The following features are deprecated:

  • The Virtuozzo file system (VZFS). For more information, see .

  • Migration of physical servers to Containers and migration of Xen virtual machines to virtual machines. For more information, see .

  • The vzbackup, vzabackup, and pbackup utilities. For more information, see .

  • The global iptables mask configured in /etc/sysconfig/vz.

  • All UBC resources except physpages and swappages (#PSBM-24231).

  • The vziptables parameter configured in the kickstart file used for unattended installations of Virtuozzo (#PSBM-27566).

All Virtuozzo 6.0 users are advised to update their tools packages.

6. Obtaining the Update

You can download and install the update using the yum utility included in the Virtuozzo 6.0 distribution.

Copyright (c) 1999-2014 Parallels IP Holdings GmbH and its affiliates. All rights reserved.

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