Description of problem: When requesting an ephemeral disk with ...format=ext4... or ...format=xfs... the parameter is ignored, blkid / dumpe2fs both confirm that the provided disk is actually ext3. See also https://bugs.launchpad.net/tripleo/+bug/1266262.
Sahid, Nikola says you might know something about this?
Note also the Juno fix https://review.openstack.org/#/c/100473/
I'm going to backport the fix proposed upstream.
This ticket was verified, you need to change the configuration before writing which format you want the disk to be. The default is ext3 and if you don't change the configuration it will create an ext3 disk regardless of what you want.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://rhn.redhat.com/errata/RHSA-2015-0843.html