Re: [gentoo-user] Re: Compiling first and then installing using -K

[Rich Freeman]

On Mon, Feb 17, 2020 at 6:31 PM Nikos Chantziaras <realnc@×××××.com> wrote:
>
> On 18/02/2020 01:21, Rich Freeman wrote:
> > On Mon, Feb 17, 2020 at 6:00 PM Nikos Chantziaras <realnc@×××××.com> wrote:
> >> Hm. I'm too chicken to try it because I'm not sure it does what I think
> >> it does, but does the "--ephemeral" option pretty much do *exactly* what
> >> Dale was asking about? Can you start your current "/" as a container
> >> as-is, emerge packages in it and save them as binaries, then install
> >> those from the outside, then shutdown the container and all is forgotten?
> >
> > Obvious way to test this would be to just set up a VM.  It has the
> > obvious advantage of always being in-sync with your host config.
> >
> > I think I might actually try playing around with this.  I'm on zfs
> > though so I'm not sure how it will perform.
>
> I just tested it in a throw-away Ubuntu VM running on ext4. It crashed
> and burned due to disk space. It tried to duplicate the whole "/" with
> zero error checks. So free space reached 0 but it still didn't abort. I
> had to abort with ctrl+c. Free space was then 200MB (out of 20GB). I did
> "du -sh /*" to find where all the GBs went, but it doesn't find it.
>

Hmm, if it just resorted to doing a cp it might have tried to copy the
copy, or if it was really brain-dead it might not have limited itself
to the root filesystem.  Granted, the necessary files might not all be
on one filesystem to begin with, but it would obviously have to avoid
copying /proc and so on.  I mean, it might have trouble with:
-r-------- 1 root root 128T Feb 11 14:31 /proc/kcore

-- 
Rich