Wondering if people would be ok with including rkt in virt7 SIG repos. some folks gave this a yay on IRC, but reaching out to the mailing list as well for more votes.
rkt is _not_ in fedora yet and including it would also imply including systemd >= 220 in virt7 as it isn't present in base CentOS.
All the gory detail around rkt packaging for fedora can be found here: https://github.com/coreos/rkt/issues/686 . The main pending issue that fedora won't agree to right now is RE: installing the stage1 rootfs tarball at rpm install time.
WIP rpm files are here: https://github.com/fedora-cloud/rkt-rpm/ . I've been adding these to my copr repo here: https://copr.fedoraproject.org/coprs/lsm5/rkt/ . markllama and lalatenduM might have something to add to this.