moving to coreOS from Fedora atomic 29

[arnaud gaboury]

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.


[0]https://github.com/coreos/coreos-installer

[Dusty Mabe]

Hi Arnaud!

On 11/29/19 12:45 PM, arnaud gaboury wrote:
>  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? 
I've never done that before. Not sure.

>  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? 
The fedora coreos installer consumes an entire disk (block device) so I'd
recommend copying off any data you want to keep before you perform an install.

>  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? 
You might be able to do that but it's definitely not common or recommended.
If I were you I would do one of:

    - copy off all data, install Fedora CoreOS, copy back data
    - test out a provision of Fedora CoreOS on a separate system

> 
> Thank you for hints, good pointers and advice.
> 
> 
> [0]https://github.com/coreos/coreos-installer
> 
> 
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[arnaud gaboury]

On 12/2/19 8:46 PM, Dusty Mabe wrote:
>  Hi Arnaud!
>
>  On 11/29/19 12:45 PM, arnaud gaboury wrote:
> > 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?
>  I've never done that before. Not sure.
>
> > 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?
>  The fedora coreos installer consumes an entire disk (block device) so I'd
>  recommend copying off any data you want to keep before you perform an install.
>
> > 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?
>  You might be able to do that but it's definitely not common or recommended.
>  If I were you I would do one of:
>
>      - copy off all data, install Fedora CoreOS, copy back data
>      - test out a provision of Fedora CoreOS on a separate system 
Sounds wise. Thank you

> > Thank you for hints, good pointers and advice.
> >
> >
> > [0]https://github.com/coreos/coreos-installer
> >
> >
> > _______________________________________________
> > CoreOS mailing list -- coreos(a)lists.fedoraproject.org
> > To unsubscribe send an email to coreos-leave(a)lists.fedoraproject.org
> > Fedora Code of Conduct:
> https://docs.fedoraproject.org/en-US/project/code-of-conduct/
> > List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines
> > List Archives:
> https://lists.fedoraproject.org/archives/list/[e-mail]
> >