Since Fedora-Rawhide-20171001.n.0 , virtually all openQA install tests from non-live media appear to be failing; the only one I can see that passes is the 'no swap device' test.

All the others seem to be running into a problem with swap handling in autopart. In anaconda.log we see this:

12:27:34,911 INF blivet.autopart: Detected 2.06 GiB of memory
12:27:34,915 INF blivet.autopart: Suggested swap size (2.06 GiB) exceeds 10 % of disk space, using 10 % of disk space (0.0) instead.
12:27:34,917 INF blivet.autopart: Swap attempt of 0.0

That '0.0' does not look right, and I think is the key source of the problems. Depending on the path that's followed, installs either wind up showing 'Error checking storage configuration' on the main hub (if using guided partitioning) or hitting a traceback if using custom partitioning but clicking the 'create partitions for me' link:

14:59:50,418 DBG blivet.autopart: existing 10 GiB disk vda (13) with non-existent msdos disklabel
14:59:50,442 DBG ui.gui.spokes.custom_storage: finished automatic partitioning
14:59:50,442 DBG exception: running handleException
14:59:50,443 CRT exception: Traceback (most recent call last):

  File "/usr/lib64/python3.6/site-packages/pyanaconda/ui/gui/spokes/custom_storage.py", line 2504, in on_create_clicked
    self._do_autopart()

  File "/usr/lib64/python3.6/site-packages/pyanaconda/ui/gui/spokes/custom_storage.py", line 135, in decorated
    return func(*args, **kwargs)

  File "/usr/lib64/python3.6/site-packages/pyanaconda/ui/gui/spokes/custom_storage.py", line 2461, in _do_autopart
    min_luks_entropy=crypto.MIN_CREATE_ENTROPY)

  File "/usr/lib/python3.6/site-packages/blivet/autopart.py", line 511, in do_autopart
    devs = _schedule_partitions(storage, disks, devs)

  File "/usr/lib/python3.6/site-packages/blivet/autopart.py", line 302, in _schedule_partitions
    storage.create_device(dev)

  File "/usr/lib/python3.6/site-packages/blivet/threads.py", line 45, in run_with_lock
    return m(*args, **kwargs)

  File "/usr/lib/python3.6/site-packages/blivet/blivet.py", line 1118, in create_device
    self.devicetree.actions.add(ActionCreateFormat(device))

  File "/usr/lib/python3.6/site-packages/blivet/threads.py", line 45, in run_with_lock
    return m(*args, **kwargs)

  File "/usr/lib/python3.6/site-packages/blivet/deviceaction.py", line 551, in __init__
    raise ValueError("resource to create this format %s is unavailable" % self._format.type)

ValueError: resource to create this format swap is unavailable

You can explore the various error cases at e.g.:

https://openqa.fedoraproject.org/tests/overview?distri=fedora&version=Rawhide&build=Fedora-Rawhide-20171010.n.1&groupid=1

which is all the results for the Fedora-Rawhide-20171010.n.1 compose. Note that live installs succeed, for some reason. The same 'Swap attempt of 0.0' appears in the logs for live installs, but they manage to complete, I'm not sure why.

Proposing as an F28 Beta blocker as this breaks all installs, which violates all kinds of basic and Beta criteria.