Comment 3 for bug 1822722

> By default HEAT_DOCKER_CMD is set docker [1] and to be replaced with podman

We don't have plan to default it to 'podman' in heat-agents.

May be that doc needs updating. Probably you should use https://docs.openstack.org/tripleo-docs/latest/install/advanced_deployment/ansible_config_download.html#config-download-with-deployed-server instead.