According to our records, this should be resolved by python-tripleoclient-5.4.2-2.el7ost. This build is available now.
According to our records, this should be resolved by openstack-tripleo-common-5.4.2-3.el7ost. This build is available now.
Verified on build 2017-09.20.2. Scaling back up worked as expected after removal of compute node.
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://access.redhat.com/errata/RHBA-2017:2825