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. 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.