We should have the sos package installed as part of our image builds.
There was a previous bz#1235725 that made use of the sosreport element from tripleo-image-elements, but that caused image builds to fail, so it was reverted.
Either fix the issue with the element and add it back to the image builds, or just install the sos package directly and don't make use of the element at all.
*** Bug 1239268 has been marked as a duplicate of this bug. ***
tested on controllers and computes
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.