I haven't tried updating fleetctl, but it seems like it has updated itself on one of the nodes in my cluster automatically! I can update the others manually, that is trivial, but that is not very useful for me going forward in terms of knowing what happened and what is expected of me for these kinds of updates.. Next time there is a fleetctl update will it update automatically or not?

I chose coreos because of it working nicely with docker and that it also rolls patch level updates automatically. If part of the rolling updates is to update coreos's other dependencies like fleet that is no problem. I'm just wondering why it would update one and not the rest?