Converting from CentOS 8

To be eligible for conversion, the system must not be running cPanel and Plesk or have package repositories configured other than official and EPEL.

If conversion fails with “[Errno 24] Too many open files”, try increasing the corresponding limit, which is 1024 by default, and restart the conversion. For example, run ulimit -n 10240 to increase the limit of open files to 10240. It will last until the end of the session.

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

Log in as the root user.
Download the vzdeploy8 script and mark it as executable:
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# wget http://repo.virtuozzo.com/vzlinux/vzdeploy/vzdeploy8 # chmod 755 vzdeploy8
The script is also available at GitHub.
Run the conversion script:
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# ./vzdeploy8
The script will swap the CentOS repositories with the VzLinux ones and replace the required packages.
Reboot to the VzLinux 8 kernel.