Hi Tim,

Sorry for the delayed response, I was traveling last week for Flock and now just catching up on email.

I have spent some time exploring rpm-ostree on fedora atomic host and fedora-iot to see how it worked in practice, to determine whether to consider moving from an ubuntu based (pi-3) home hub for our IoT platform to fedora to enable easier updating of the OS image and our local platform services and applications, as well as, secondarily, considering the benefits of a similar migration for the cloud-based elements of our platform.

I've been composing custom trees on top of the various Fedora edtions, atomic host and fedora-iot on both x86_64 and aarch64 hosts and updating this various ways, layering packages, rebasing, upgrading, rolling back etc.  

To date, the custom trees have all been based on atomic host rather than IoT, because whilst I could find the atomic host tree definition repo (at https://pagure.io/fedora-atomic/tree/master), I have been unable to find similar for fedora-IoT.  

Could someone point me in the right direction please?

Certainly, I have planned when things settle down a bit and we've got a complete release out to document this much better. In the mean time the configs are all available under the fedora-iot pagure project.

rpm-ostree/atomic config:https://pagure.io/fedora-iot/atomic

pungi config: https://pagure.io/fedora-iot/pungi-iot

Feedback and tweak suggestions on the configs welcome, both to make it easier for your consumption as well as improve the upstream Fedora IoT components.

All existing docs plus details of things like building your own tree will be linked to from the main wiki page as they're done: https://fedoraproject.org/wiki/InternetOfThings/