We should use an ephemeral Heat stack for the overcloud deployment the same way as we do for the undercloud install and standalone installs. This work relies on the composable networks v2 effort to decouple the Heat and Neutron interactions.
spec: https://specs.openstack.org/openstack/tripleo-specs/specs/wallaby/ephemeral-heat-overcloud.html docs: https://docs.openstack.org/project-deploy-guide/tripleo-docs/latest/deployment/ephemeral_heat.html
Ephemeral Heat test cases passed. In addition every Phase 3 job tests ephemeral heat.
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 (Release of components for Red Hat OpenStack Platform 17.0 (Wallaby)), 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/RHEA-2022:6543