Dead-simple module for managing dpkg.
Ok, "managing dpkg" is overstating it a bit. A lot. I've got some repositories that don't have multiple architectures, but Ubuntu Precise is brain-dead ("imprecise", as it were) and insists on looking for architectures my hosts don't support. So now you can turn that behavior off.
class {'dpkg':
disable_multiarch => true,
}
Or better, do the hiera thing.