Can't get past Grub and Dracut shells after ostree upgrade

[gucci-on-fleek (Max Chernoff)]

In case anyone else runs into this, a solution is to boot into a live CD, run the commands from above:

@gucci-on-fleek

# mkdir /x/
# mount /dev/vda4 /x/
# mount /dev/vda2 /x/boot/
# mount /dev/vda1 /x/boot/efi
# mount --bind /dev /x/dev
# mount --bind /proc /x/proc
# mount --bind /sys /x/sys
# deploy="/sysroot/ostree/boot.1/fedora-iot/9bcd9212246ae456c144c97977daf59b706493a1c791b52edb483dd838626bf2/0/"
# mkdir /x/usr && mount --bind $deploy/usr /x/usr
# mkdir /x/etc && mount --bind $deploy/etc /x/etc
# mkdir /x/bin && mount --bind $deploy/bin /x/bin
# mkdir /x/sbin && mount --bind $deploy/sbin /x/sbin
# mkdir /x/lib && mount --bind $deploy/lib /x/lib
# mkdir /x/lib64 && mount --bind $deploy/lib64 /x/lib64
# chroot /x/
# mv /etc/default/grub /etc/default/grub.save
# grub2-mkconfig -o /boot/grub2/grub.cfg
# exit
# reboot

then reboot into the system, verify that /boot/grub2/grub.cfg is still a file (and not a broken symlink), then run:

 $ sudo chattr +i /boot/grub2/grub.cfg

After you’ve done this, it should be safe to run rpm-ostree upgrade again.

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This solution is a horrible hack though, so I’ll try and find a way to reproduce this and file it on the IoT issue tracker.