Description:

I was building a package with staging-x86_64-build and wanted to launch a concurrent build for i686; running staging-i686-build from another terminal would simply exit after the following step:

==> Creating clean working copy [foutrelis]...done

Changing /usr/sbin/mkarchroot's hashbang to call bash with -x revealed that the last command executed was:

# systemd-nspawn -D /var/lib/archbuild/staging-i686/foutrelis --bind=/var/cache/pacman/pkg/ -- /chrootbuild

Running that command just outputs "Container already running." and immediately exits.

That message comes from systemd's nspawn.c¹ which I think just checks if the cgroup name already exists and according to 'systemd-cgls' that's just systemd:/machine/foutrelis for both i686 and x86_64 chroots.

Looks like we can pass a more diverse name to systemd-nspawn with the -M option; e.g. something like -M archbuild-staging-x86_64-foutrelis. (I'm not sure if that information is readily available in mkarchroot though.)

¹ http://cgit.freedesktop.org/systemd/systemd/tree/src/nspawn/nspawn.c


Additional info:

devtools 20130408-1
systemd 202-2