I need to install a linux system from scratch, install and configure Nginx/Varnish/Php-fpm for high usage. The server has KVM,
Configure mysql for HIGH usage correctly. The sites have a strong use of Mysql and php.
Install postfix and copy the config from the old server to the new one.
Preferably install a pre hardened distro with IDs configured.
Then move the old sites (in another partition) to the new one.