Hi, At the Denver forum during the kolla feedback session [1], the topic of support for podman [2] and buildah [3] was raised. RHEL/CentOS 8 removes support for Docker [4], although presumably it will still be possible to pull down an RPM from https://download.docker.com/linux/. Currently both kolla and kolla-ansible interact with docker via the docker python module [5], which interacts with the docker daemon API. Given that podman and buildah are not daemons, I would expect the usage model to be a bit different. There is a python API for podman [6] which we might be able to use. I understand that Tripleo uses buildah to build images already (please correct me if I'm wrong). How is this achieved with kolla? Perhaps using 'kolla-build --template-only' to generate Dockerfiles then invoking buildah separately? Are you planning to work on adding buildah support to kolla itself? For running services, Tripleo uses Paunch [7] to abstract away the container engine, and it appears Podman support was added here - building CLI argument strings rather than via a python API [8]. For anyone using kolla/kolla-ansible, please provide feedback on how useful/necessary this would be to you. Thanks, Mark [1] https://etherpad.openstack.org/p/DEN-train-kolla-feedback [2] https://podman.io/ [3] https://buildah.io/ [4] https://access.redhat.com/solutions/3696691 [5] https://github.com/docker/docker-py [6] https://github.com/containers/python-podman [7] https://docs.openstack.org/developer/paunch/readme.html [8] https://github.com/openstack/paunch/blob/ecc2047b2ec5eaf39cce119abe1678ac19139d79/paunch/builder/podman.py