Perhaps it’s a confusion with k3os, a k3s operating system. https://github.com/rancher/k3os
I love all of the oddball projects being spun out by Rancher/Suse. It can be hard to keep track of them.
Oh wait this one is kubernetes distro, and that one's an OS and this thing... well it's a... err... binary container something-or-other?
Perhaps it’s a confusion with k3os, a k3s operating system. https://github.com/rancher/k3os