Hi, Last week I asked RDO related question in CentOS-devel mail list, you can see the question from bottom link [1]. Thanks for Alfredo kindly help. After we do some POC to build packages in link [2] , I still have some questions: 1. We want contribute to RDO community, let RDO add s390x architecture build. As there is no CentOS s390x architecture build in CentOS repositories, we can only build and test RDO packages in RHEL, Is it possiable we add RDO s390x build without CentOS s390x architecture build? Build CentOS might need much more effort and time. 2. I'm trying building RDO Train packages in [2] in RHEL 8 on LinuxONE, seems there are some package missing, such as python-d2to1. Should I switch to build RDO Train in RHEL 7 as the start step, wait until RDO train for CentOS 8 is ready? 3. For RDO Train on RHEL 8, can I expect python 3 is the default Python interpreter for all OpenStack packages and dependecy packages? Thank you. [1] https://lists.centos.org/pipermail/centos-devel/2019-October/017948.html [2] https://trunk.rdoproject.org/rhel8-master/ -- Shi Lin, Huang IBM China Systems Lab, Beijing, China