Drive the assignment genimage makes and check the name debootstrap receives for
each architecture, including the POWER LE spelling that debootstrap rejects.
genimage translated one architecture for debootstrap, x86_64 to amd64, and
compared against a bareword rather than a string, which only resolves because
the script does not enable strict subs.
Read the name from xCAT::Utils, which genimage already loads. Every
architecture reaches debootstrap with the name it does today.
Pin both directions for every architecture xCAT supports on Ubuntu, the
pass-through for names Debian shares, and the round trip that copycd and
debootstrap depend on agreeing about.
copycd translated the architecture the Ubuntu media reports with its own
if/elsif chain, and genimage translates the same names back for debootstrap with
another one. Neither can be reused, so a new architecture has to be added to
both.
Put both directions in xCAT::Utils and have copycd read from there. The names
and the fallback do not change: media that xCAT has no name for still leave the
architecture as the media reported it.
Build each Ubuntu media layout on disk and ask the resolver for its kernel and
initrd: the netboot trees, the flat netboot layout, both casper images, and the
POWER layouts where the kernel and the initrd sit in different directories.
Pin the precedence the installer depends on, a netboot tree over a live image
and a hardware-enablement kernel over the release one, and pin the three ways
media resolve to nothing.
The probe spelled out every candidate path twice inside one nested condition,
once to test it and once to assign it, so adding an architecture meant adding
another branch of the same shape. Move the candidates into a table keyed by
architecture family and walk it in order.
Same paths, same precedence, same failure behaviour: a media tree that matches
nothing leaves the caller on the "install image not found" path as before.
Vinícius Ferrão
Daniel Hilst