Actually it doesn't matter which db you choose, the system (as of maybe a month and a bit ago?) will re-install the relevant database packages as soon as you select it in the install steps (as opposed to installing it initially when you do npm install for the first time). So your problem really is, that LevelDB might have some issues installing with CentOS?
Have a look here, if it works for you I'd definitely appreciate if you can let me know what you did so that I can add it to the docs 🙂
