Just an good advice: Never ever trust a single point/server without backups. Do backups, do snapshots (check if and how you can do that), store them somewhere e

Just an good advice: Never ever trust a single point/server without backups. Do backups, do snapshots (check if and how you can do that), store them somewhere else. Try to do automated reinstall with e.g. Ansible so that you can move easily. It's an investment at the beginning and during running the server but if the stuff is critical you should always do that.