Product update: Virtuozzo 7.0 Update 12 (7.0.12-328)

Issue date: 2019-12-03

Applies to: Virtuozzo 7.0

Virtuozzo Advisory ID: VZA-2019-091

1. Overview

The Update 12 for Virtuozzo 7.0 provides new features as well as stability and usability bug fixes. It also introduces a new kernel 3.10.0-1062.4.2.vz7.116.6.

2. New Features

  • Backup via reversed delta. A VM with a write-intensive workload may write to its snapshot blocks faster than they are backed up, so writing is slowed down to the backup speed. To avoid this, you can set a local directory to store intermediate temporary VM images during backup. So when a VM changes its snapshot blocks that have not been yet backed up, a copy of them is created in this directory and the original can be rewritten without delay. Once the backup is complete, the temporary VM image is deleted.

  • Support for CentOS 8 in containers and virtual machines.

3. Bug Fixes

  • Unable to restore LUKS partition from backup if source image format is not specified. (PSBM-96303)

  • A container with an NFS mount and ‘x-systemd-automount’ specified in fstab options could cause the node to hang if NFS server was inaccessible. (PSBM-98297)

  • Periodical interface restart when VLAN with a bonding interface was created in the installer. (PSBM-98165)

  • A container nfsd inside could crash the node during NFS-related operations. (PSBM-97738)

  • Writeback lockups could result in node hangs. (PSBM-97743)

  • Nodes running Virtuozzo Storage could overload and slow down significantly due to insufficient default pagecache limit. (PSBM-94761)

  • Other fixes. (PSBM-73447, PSBM-83783, PSBM-94761, PSBM-95177, PSBM-95734, PSBM-95805, PSBM-96057, PSBM-96133, PSBM-96225, PSBM-96262, PSBM-96286, PSBM-96287, PSBM-96390, PSBM-96615, PSBM-96764, PSBM-96892, PSBM-96901, PSBM-96978, PSBM-97012, PSBM-97024, PSBM-97048, PSBM-97085, PSBM-97105, PSBM-97246, PSBM-97319, PSBM-97542, PSBM-97729, PSBM-97730, PSBM-97891, PSBM-97899, PSBM-97905, PSBM-97932, PSBM-98075, PSBM-98311, PSBM-98456, PSBM-98742, PSBM-98796, PSBM-98834, PSBM-99107, PSBM-99133, PSBM-99557, PSBM-99561)

4. Installing the Update

Install the update with ‘yum update’. Reboot the host and switch to the new kernel.

The JSON file with the list of new and updated packages is available at