File /usr/share/openstack-puppet/modules/octavia/manifests/housekeeping.pp exposes setting spare_amphorae_pool_size which sets the incorrect parameter octavia.conf Already fixed upstream https://review.opendev.org/#/c/668488/ but would need backport to OSP13.
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-2019:3794