The postconfig command has problems if you are pointing to the wrong cloud and has the potential to ruin the undercloud. This moves the steps to the final stage of deployment and alleviates the need to source a different rc file.
Fixed in https://review.gerrithub.io/#/c/236666/
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.