suse-online-update
This is a simple wrapper script around zypper and other system-management software for installing updates automatically which doesn't require any interaction.
Find the package for your distribution at https://software.opensuse.org/package/suse-online-update
Configuration is in /etc/sysconfig/suse-online-update and can be edited via YaST2 -> /etc/sysconfig-Editor or by any other Editor of your choise.
Have a lot of fun!