[Mageia-sysadm] Needs locking iurt chroot tarballs

[Pascal Terjan]

On Tue, Feb 28, 2012 at 08:02, Thierry Vignaud
<thierry.vignaud at gmail.com> wrote:
> Hi
>
> Yesterday evening, iurt chroot was rebuild due to new rpm.
> However some packages failed to build:
> http://pkgsubmit.mageia.org/uploads/failure/cauldron/core/release/20120228010948.fwang.valstar.11974/log/botcmd.1330391389.jonund.log
>
> D: [iurt_root_command] Running iurt_root_command --untar
> /home/iurt/chroot_cauldron.x86_64.tar.gz
> /home/iurt/chroot_tmp/iurt/chroot_cauldron...
> D: [iurt_root_command] Uncompress tarball
> gzip: stdin: unexpected end of file
> tar: Unexpected EOF in archive
> tar: Unexpected EOF in archive
> tar: Error is not recoverable: exiting now
> I: [iurt_root_command] ERROR: Uncompress tarball
>
> There're 2 bugs:
> 1) build continues despite the tar failure
> 2) we should:
> - either lock the chroot tarball when rebuilding it and when unpackagint it
>  in order to prevent that to happen again
> - ensure chroot tarball is updated atomically (temp tarball + single mv)

There is supposed to be only one iurt per version-arch on a given
machine at a time, so if two iurt run on the same machine they use
different chroot tarballs