I would like to secure a system

[kungfujesus]

I'm running an application which uses a python app to access a SQL database on a server. I would like this computer running the app to use OpenBSD and would love to have the root file system encrypted, since physical access to it won't be all that difficult for many people. Does anybody here know a way to do this? I can't for the life of me find out how. I've found guides on encrypting individual file systems, but never the entire root. Linux allows for something like this so easily, I find it hard to believe BSD wouldn't.