User`s guide

Upgrading Host Operating Systems with Parallels Virtuozzo Containers

Upgrading a Host OS with Parallels Virtuozzo

Containers 4.0 or 4.6

To upgrade a server that runs one of the supported Host OSs and Parallels Virtuozzo Containers

4.0 or 4.6, 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 Backup & Recovery 10 Advanced Server (a free

trial version is available at http://www.acronis.com/backup-recovery/advanced-server)

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 Install Parallels Virtuozzo Containers 4.7. For detailed information on installing Parallels

Virtuozzo Containers 4.7, see the Parallels Virtuozzo Containers 4.7 Installation Guide. Once the

installation is complete, restart the server.

5 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.

6 Restart the Virtuozzo service:

# service vz restart