Description of problem: Currently newer ppc64 systems are having problems with yaboot. And tftp booting the kernel into memory. The work around is to use grub2 which has lots of options. We need to look at making beaker support using grub2 for ppc64 systems to provision them as right now none of these systems will netboot via yaboot properly. I will move some systems in to the devel instance for testing and will document how I have been testing it.
We have aarch64 support now (including a boot menu), it is using EFI GRUB2, so hopefully things work the same way for ppc64. We will just need to figure out a directory layout that doesn't conflict.
Preliminary patch: http://gerrit.beaker-project.org/#/c/3228/ Completely untested in a real setup.
Beaker 0.17.3 has been released (https://beaker-project.org/docs/whats-new/release-0.17.html#beaker-0-17-3)