User`s guide

Upgrading Host Operating Systems with Parallels Virtuozzo Containers 20
Upgrading a Host OS with Parallels
Virtuozzo Containers 4.0
To upgrade a server that runs one of the supported Host OSs and Virtuozzo 3.0 Service Pack 1,
do the following:
1 Back up all Virtuozzo and Container configuration files. These are the following files:
 /etc/sysconfig/vz-scripts/*.conf
 /etc/sysconfig/vz
 /etc/vz/*
 /etc/cron.d/venetclean
 /etc/cron.d/vereboot
You can back up these files to any location. For example, you can just copy them to the
/vz/conf partition that is left intact during the upgrade.
2 As with any major changes to the hard disk, it is recommended that you do the following
before starting the upgrade:
a Back up all Containers (former Virtual Environments) on the Hardware Node.
b Perform a full backup of the entire Virtuozzo server using a third-party software. For
example, you can make use of the Acronis
®
True Image Echo™ Enterprise Server (a
free trial version is available at
http://www.acronis.com/enterprise/download/ATIESWin/) software allowing you to
quickly create an exact copy of your server and to easily restore the entire system if
something goes wrong during the upgrade.
3 Reinstall the Host operating system on the server. When reinstalling the system, make sure
that the /vz partition is left intact. Once the installation is complete, restart the server.
4 Once the Parallels Virtuozzo Containers 4.6 installation is complete, restore the Virtuozzo
and Container configuration files you backed up in Step 1:
 Restore the vz Virtuozzo global configuration file to the /etc/sysconfig directory.
 Restore the /etc/sysconfig/vz-scripts/*.conf file to the
/etc/sysconfig/vz-scripts directory.
 Restore the contents of the /etc/vz/* directory to the /etc/vz directory.
 Restore the files /etc/cron.d/venetclean and /etc/cron.d/vereboot to
the /etc/cron.d directory.
5 Install Parallels Virtuozzo Containers 4.6. For detailed information on installing Parallels
Virtuozzo Containers 4.6, see the Parallels Virtuozzo Containers 4.6 Installation Guide.
Once the installation is complete, restart the server.
Note: During the Parallels Virtuozzo Containers 4.6 installation, new configuration files
corresponding to those you restored in Step 3 are put to the same directory under the name
configuration_file_name.rpmnew. For example, for the vz global Virtuozzo file,
a new configuration file with the name vz.rpmnew will be created in the
/etc/sysconfig directory.