Article ID: 117202, created on Sep 10, 2013, last review on Sep 13, 2015

  • Applies to:
  • Virtuozzo 6.0
Synopsis:          New Parallels Cloud Server 6.0 update introduces new features
                                   and provides stability fixes.
Issue date:        2013-09-11
Product:           Parallels Cloud Server 6.0
Keywords:          'stability' 'usability'
1. What's Included in This Update
The new packages for Parallels Cloud Server 6.0 introduce new features and
provide fixes for managing virtual machines, Containers, and Parallels Cloud
2. Problem Description
The new packages introduce the following features:
- Support for NFSv4.* mounts in Containers (#PSBM-17793). You can enable NFSv4
  support on a Hardware Node by running the sysctl -w fs.nfs.nfs4_ct_enable=1
  command. To make sure the NFSv4 support remains enabled after Node reboot, add
  the fs.nfs.nfs4_ct_enable=1 line to /etc/sysctl.conf.
  Next time a resource is mounted, Parallels Cloud Server will automatically
  choose the latest NFS version supported by both the server and client.

- Support for failure domains in Parallels Cloud Storage (#PSBM-20618). A
  failure domain is a set of services which can fail in a correlated manner. Due
  to correlated failures it is very critical to scatter data replicas across
  different failure domains for data availability.
  Every Parallels Cloud Storage service component now has topology information
  assigned to it. Topology paths define a logical tree of components -- physical
  locations consisting of 5 identifiers which are referred to as The first 3 topology path components (room.row.rack)
  can be configured by user via /etc/pstorage/location configuration files. The
  last 2 components (host.cs) are auto-generated and should not be modified by
  user. The unique host identifier is randomly generated during installation and
  located at /etc/pstorage/host_id. CS is a unique service identifier generated
  upon CS creation.
- Support of HDD hot plugging and unplugging to easily add new or replace failed
  HDDs (#PSBM-20760). Introduced in this update is pstorage-hotplug, a set of
  scripts which use udev and enable you to automatically create and start a CS
  on an HDD hot plug event and stop a CS on an HDD hot unplug event
  (stopped CSes need to be deleted manually). The HDDs in question must be
  detected by the operating system and not work via a RAID controller.
  Note: Special considerations apply to sharing SSD write cache between running
  CSes. This functionality is not implemented yet, so CSes with SSD journals
  will not be started automatically on disk hotplug.
The new packages contain fixes for the following issues:
- Offline migration of ploop Containers results in much longer downtime compared
  to VZFS Containers (#PSBM-19407).
- Unfinished operations prevent virtual machines from booting for much too long

- prl_convert fails with the RESIZER_REPAIR_FS_VOLUME_ERROR error (#PSBM-20300).
- Cannot backup virtual machines with attached physical HDDs (#PSBM-20366).
- Backing up a virtual machine fails if its virtual hard disk is being compacted
- Online migration failures are reported in Parallels Virtual Automation only
  after 24 hours if the source and destination nodes have no swaps configured
- Online migration fails for virtual machines created in Parallels Virtual
  Automation (#PSBM-20687).
- Impossible to have EID unchanged during Container migration (#PSBM-20717).
- Dispatcher hangs after backup failure (#PSBM-21919).
- A number of other minor issues were fixed (#PSBM-18017, #PSBM-18267,
  #PSBM-18902, #PSBM-19176, #PSBM-19512, #PSBM-19805, #PSBM-19885, #PSBM-19999,
  #PSBM-20006, #PSBM-20022, #PSBM-20079, #PSBM-20353, #PSBM-20374, #PSBM-20564,
  #PSBM-20613, #PSBM-20640, #PSBM-20678, #PSBM-20685, #PSBM-20714, #PSBM-20756,
  #PSBM-20799, #PSBM-20885, #PSBM-20906, #PSBM-20913, #PSBM-21014, #PSBM-21205,
  #PSBM-21358, #PSBM-21397, #PSBM-21516, #PSBM-22083).
All Parallels Cloud Server 6.0 users are advised to update their tools

3. Obtaining Update
 You can download and install this tools update using the yum utility
 included in the Parallels Cloud Server 6.0 distribution.
Reboot (vzreboot) is required for that update.
Copyright (c) 1999-2013 Parallels Holdings, Ltd. and its affiliates. All rights

c62e8726973f80975db0531f1ed5c6a2 2897d76d56d2010f4e3a28f864d69223 0dd5b9380c7d4884d77587f3eb0fa8ef

Email subscription for changes to this article
Save as PDF