On Rocky Linux 9, MiniONE fails during the installation of OpenNebula because libmysqlclient.so.21 is missing:

Installing OpenNebula packages  retry 1 retry 2 retry 3 FAILED
yum -y install opennebula ...
--- STDERR ---
Error:
 Problem 1: conflicting requests
  - nothing provides libmysqlclient.so.21()(64bit) needed by opennebula-7.0.0-1.el9.x86_64
...
 Problem 6: package opennebula-flow-7.0.0-1.el9.noarch from opennebula requires opennebula-rubygems = 7.0.0, but none of the providers can be installed

This seems to happen because RHEL 9-based distros no longer include the MySQL 8.0 client libraries by default, they use MariaDB instead.

Installing mysql-community-libs manually before running MiniONE resolves the issue:

sudo dnf install -y mysql-community-libs --nogpgcheck

Might be worth handling this in the script or showing a note when it detects EL9 systems.