[arch-dev-public] makechrootpkg without aufs2

[Aaron Griffin]

On Sun, Jan 24, 2010 at 1:38 AM, Tobias Powalowski <t.powa at gmx.de> wrote:
> Am Sonntag 24 Januar 2010 schrieb Aaron Griffin:
>> On Sat, Jan 23, 2010 at 11:39 PM, Dan McGee <dpmcgee at gmail.com> wrote:
>> > On Sat, Jan 23, 2010 at 9:59 PM, Aaron Griffin <aaronmgriffin at gmail.com>
> wrote:
>> >> On Sat, Jan 23, 2010 at 7:29 PM, Allan McRae <allan at archlinux.org> wrote:
>> >>> On 24/01/10 09:08, Pierre Schmitz wrote:
>> >>>> Hi devs,
>> >>>> <snip>
>> >>>>
>> >>>> This can be easily done by changing this in makechrootpkg:
>> >>>>
>> >>>>     mount -t aufs none -o
>> >>>> "dirs=$chrootdir/$LAYER=rw:$chrootdir/root=ro" "$uniondir"
>> >>>>
>> >>>> to
>> >>>>
>> >>>>     rsync -a --delete --progress -h -c -W "$chrootdir/root/"
>> >>>> "$uniondir"
>> >>>>
>> >>>> <snip>
>> >>>
>> >>> You get a +1 from me for the idea.  But looking at the rsync line, I
>> >>> think that this will not work if I use makechrootpkg with "-- -i" to
>> >>> install a package then use it without "-c" to build on top of that?  I
>> >>> guess we should not do the rsync if "-c" is not specified.
>> >>
>> >> I'm fine with this approach. aufs was used originally (well, unionfs)
>> >> because it was a cheap way to say "don't break this chroot". Copying
>> >> is fine.
>> >>
>> >> BUT (there's always a but), some systems are size restricted. For
>> >> instance, slicehost slices have very limited disk space, so copying
>> >> the chroot to do this has potential to cause issues. I don't like
>> >> special case code for shitty systems, but perhaps we could keep both
>> >> aufs and rsync code in there, enabled by a command line switch? (-U
>> >> use a union (aufs) to keep chroot clean [DEPRECATED])
>> >
>> > How many people are building clean packages on a size-restricted
>> > system? I'm guessing this is an edge case where you might be one of
>> > the few exceptions.
>>
>> Tis true, I was just pointing out that it COULD cause issues. For
>> instance, if you home partition is small and you're bittorrenting
>> 8gigs of Friends episodes (like Dan does all the time), you might end
>> up running out and not being able to build until the torrent is done
>> and you move them to some other location.
>>
>> It's definitely not a show stopper, but using rsync isn't without its
>> own problems
>>
> When this change happens, shall we drop the aufs patch too from kernel?
> I don't use it at all.

Not just yet, the ISOs use aufs, and there's no real good system to replace that