kolla/ansible/roles/heat/templates/heat-engine.json.j2

{
    "command": "heat-engine",
    "config_files": [
        {
            "source": "{{ container_config_directory }}/heat.conf",
            "dest": "/etc/heat/heat.conf",
            "owner": "heat",
            "perm": "0600"
        }
    ]
}