WIP: deps: Add lorax

[cgwalters]

We aren't using it today, but we might use it in the future - or
we may at least share code.

Since this container is enormous anyways, there's no real downside
to adding the dep now.

For more information, see discussion in:
#91

[jlebon]

Hmm, we won't actually start using/sharing code with it anytime super soon though, right? Let's just leave this open until that changes?

[cgwalters]

(Also I got confused, lorax-composer is a separate package)

So...one angle we could take would be to replace our existing virt-install wrapper with this. I'm not sure if it's really worth doing though.

[Promaethius]

Using lorax in builds requires either a lorax PR to enable local repos through a local mount or a migration away from how virt-install.py disables the network interface to pull a local ostree repo.
#91 (comment)

Looking at the class lorax uses to launch the VM (https://github.com/weldr/lorax/blob/master/src/pylorax/installer.py#L134) it shouldn't be too hard to pass in extra opts.

Something on this line might work:

cat >>local.ks <<EOF
%include ${kickstart_input}
%pre
mkdir -p /mnt/ostree-repo
mount -t 9p -o ro,trans=virtio,version=9p2000.L /mnt/ostree-repo /mnt/ostree-repo
%end
ostreesetup --nogpg --osname=coreos --remote=coreos --url=file:///mnt/ostree-repo --ref="${ref}"
%post --erroronfail
touch /boot/coreos-firstboot
%end
EOF

ksflatten -c $(pwd)/local.ks -o $(pwd)/flattened.sk

livemedia-creator --resultdir=$(pwd)/ \ 
  --image-type=qcow2 --image-name=${imageprefix}-base.qcow2 \
  --ks=$(pwd)/flattened.ks \
  --iso=${workdir}/installer/*.iso \
  --logfile=$(pwd)/install.log

I'm not super familiar with virt mounts but the mount -t 9p -o ro,trans=virtio,version=9p2000.L /mnt/ostree-repo /mnt/ostree-repo indicates a mount from guest os into root os correct?

[cgwalters]

I'm not super familiar with virt mounts but the mount -t 9p -o ro,trans=virtio,version=9p2000.L /mnt/ostree-repo /mnt/ostree-repo indicates a mount from guest os into root os correct?

Yep! The only downside to this is that 9p isn't in the RHEL kernel. An alternative might be something like HTTP-over-virtio.

[Promaethius]

I'm not super familiar with virt mounts but the mount -t 9p -o ro,trans=virtio,version=9p2000.L /mnt/ostree-repo /mnt/ostree-repo indicates a mount from guest os into root os correct?

Yep! The only downside to this is that 9p isn't in the RHEL kernel. An alternative might be something like HTTP-over-virtio.

That would be more universal... if the container already ships with python, just throw up a simpleHTTPServer on 127.0.0.1 before virt-install and change the script to allow networking. Atomic style.

[cgwalters]

Doesn't seem like we're going to do this.