If you really want a good fallback plan, the gold standard is a drive image; whether that's a vRanger backup of a VMWare VM, or a Paragon/Acronis TrueImage/DD/Clonezilla/Norton Ghost image of a physical box, or even a Parted Magic copy of a partition, it's a way of doing a bare-metal restore to exactly the state you were in prior to the image.

Note that for the commercial options, it's usually several hundred dollars per Server OS.