User`s guide

This section describes how to roll back an unsuccessful upgrade from Parallels Virtuozzo

Containers 4.6 to Parallels Virtuozzo Containers 4.0 or Virtuozzo 3.0 Service Pack 1.

If the upgrade was unsuccessful, use one of the following ways to return the system to its

original state:

 If you created a backup of the entire Hardware Node (for example, using the Acronis

True

Image Echo™ Enterprise Server software) before the upgrade, perform a full system restore

by following the instructions given in the corresponding product documentation.

 If you backed up all Containers (former Virtual Environments) that existed on the Hardware

Node before the upgrade, but did not create a full backup of the Hardware Node, do the

following:

a Reinstall the Linux distribution on the Node.

b Install the original version of the product on the Node (Virtuozzo 3.0 Service Pack 1 or

Parallels Virtuozzo Containers 4.0).

c Restore the Containers from their backups.

Before starting the rollback operation, run the vzreport utility to contact the Parallels support

team and inform it of the problem you have encountered. This utility automatically collects the

necessary logs, network, system, and troubleshooting information into a single file and

downloads it to the Parallels technical support server. vzreport does not send your private

information to Parallels.

If it is impossible to make use of the vzreport utility, please back up the log files generated

during the upgrade procedure and send them to the Parallels support team. Please provide the

support team with the following log files:

 /var/log/vzsveupgrade.log

 /root/vzinstall.log (if you performed the upgrade using the install utility)

 /root/virtuozzo/vzautoinstall.log (if you performed the upgrade using the

vzinstall-linux.bin utility)

Rolling Back to a Previous Version