[atomic] Notice for Fedora Atomic+Kubernetes Users

[Josh Berkus <jberkus redhat com>]

Community members:

**TL;DR**: If you are a production user of Kubernetes on Fedora Atomic
Host, please don't rebase to Fedora Atomic 25 yet.

One of the features of the Fedora Atomic Host 25 release was decoupling
Kubernetes from the base ostree for Atomic (this is true of the current
CentOS Atomic Host as well).  That is, Kubernetes is no longer in the
base install, you need to add it in as system containers and/or an
overlay.  This is a step forwards for Atomic because it means that users
can continuously update Atomic, and update Kubernetes on a different
schedule which works for their cluster.  Since Kubernetes
gets released four times a year, this lets developers update to the
latest version, and production users stay on their production version.

However, when we released Fedora Atomic 25, the containerized install
wasn't quite ready, and there were issues with installing Kubernetes
using package layering which we hadn't anticipated.  At the time, we
expected those issues to be resolved within a few days.  Instead, some
have taken longer than expected and are still unresolved or waiting on
PR review.

The Fedora Atomic team is hard at work on getting a solution out for
Kubernetes users and expect to have one before the holidays.  If you are
able to help with building or testing, please speak up on the Atomic
Development mailing list; we
could use your help.  If you can't help, wait for us to publish
documentation of the new containerized Kubernetes before you rebase to
25.  Bug fixes are still available for the Fedora 24 tree.

If you use Fedora Atomic, but do not use Kubernetes, this issue does not
affect you.  If you are using Kubernetes based on a containerized
install already (via Kubeadm or Hyperkube), this issue is also not a
problem for you.  Unaffected users should rebase to Fedora Atomic 25
for updated libraries and platforms, including the latest OpenShift and
Docker support.

We apologize for any trouble this causes for you, and we're working hard
on a solution.


-- 
--
Josh Berkus
Project Atomic
Red Hat OSAS