Is hyper-v host wipe-and-load scenario safe for guests? thinking of upgrading host from 2008 r2 to 2012 r2

Hello,

Planning a future domain controllers upgrade to 2012 R2 level, that includes one virtual domain controller (hyper-v guest). Figured it would be a good idea also to upgrade (wipe and load) the 2008 R2 Hyper-V host to 2012 R2.

Basically, wondering if that is a safe scenario to simply wipe the 2008 R2 host and load Hyper-V 2012 R2, then re-attach existing guest files to host using existing vhd and config files residing on separate partition. safe?

Thanks for input!