Converting from CentOS 7

To convert a CentOS 7 installation to VzLinux 8, do the following:

1. Log in as the root user.

2. Update the system:

   1	# yum update

3. Add the VzLinux repository. For example:

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   # cat << EOF > /etc/yum.repos.d/vzlinux.repo [vzlinux] name=vzlinux baseurl=http://repo.virtuozzo.com/vzlinux/7.9/x86_64/os/ enabled=1 gpgcheck=0 EOF

4. Install the conversion tool from the VzLinux repository:

   1	# yum install vzupgrade

5. Disable the VzLinux repository. For example:

   1	# yum-config-manager --disable vzlinux

6. Optionally, add custom executable files. Files placed in /usr/share/vzupgrade/pre-check will be run before the check stage (including vzupgrade check). Files placed in /usr/share/vzupgrade/pre-install will be run before the upgrade stage. All executable files are run in the alphabetical order.

7. Check that the system is ready for converting:

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   # vzupgrade check --skip-vz No upgrade blockers found! <...> A report has been generated at /var/log/leapp/leapp-report.json A report has been generated at /var/log/leapp/leapp-report.txt <...> Answerfile has been generated at /var/log/leapp/answerfile

   This command will imitate the conversion, downloading the required RPM packages in the process.

   If issues are found, investigate the logs in /var/log/leapp. In addition, note the packages that are marked as unknown. They may be removed during the upgrade.

8. Once no blockers have been found and the system is ready, launch the conversion:

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   # vzupgrade install --skip-vz <...> A reboot is required to continue. Please reboot your system. A report has been generated at /var/log/leapp/leapp-report.json A report has been generated at /var/log/leapp/leapp-report.txt <...> Answerfile has been generated at /var/log/leapp/answerfile

   The upgrade tool will perform preparation steps and ask you to reboot to the kernel Vz-Upgrade-Initramfs to perform the upgrade.

9. Reboot to the VzLinux 8 kernel.