Both of those environments are mixed-OS. The build farms are composed of a Jenkins master with multiple slaves of various OSes: Ubuntu, RHEL, and Windows. My home network is running Kerberos and OpenAFS (amongst many other random things [1]) on Ubuntu and Windows.
> We don't believe in hiding too many OS details from you -- for instance, not only do package names vary between distributions but think about how Apache is managed so very differently between Ubuntu and CentOS -- in fact, we've observed in many cases that trying to pave over those things can make content a lot harder to work on.
I don't know... the Puppet module for Apache [2] seems to do a reasonably good job of managing this. Admittedly, pretty much none of the "main" Puppet modules support Windows, but the underlying resource system absolutely does, so adding that support is just a matter of submitting pull requests to the modules.
[1] Everything's documented here: https://justdavis.com/karl/it/