I plan to move my bare metal server from Fedora 29 atomic to coreOS as I understood Fedora atomic 29 is ending soon. Even if my server is quite recent and very basic, I don't want to mess things. I have been looking for good documentation, but can't hardly find good ones except the official coreos-installer github README[0]. I take the opportunity of this move to improve my knowledge of how OSTree works as it is new and I am far from understanding well all its features.
I have a few basic questions before I go.
1- Is it ok to scp the whole `/sysroot/ostree/deploy/fedora-atomic` directory as a backup before I go? 2- Is installing coreOS like an upgrade (i.e I will keep my folders like $HOME and settings in /etc) or will coreOS erase everything? 3- Am I right to think I can use OSTree functionality and install coreOS in `/sysroot/ostree/deploy/` alongside fedora atomic? This way i could reverse and boot to fedora atomic in case of issue. If I can do this, what's the correct way to install coreOS alongside atomic?
Thank you for hints, good pointers and advice.