sed -i 's/mirror.centos.org/mirrors.ustc.edu.cn/g' /etc/yum.repos.d/CentOS-OpenStack-queens.repo sed -i 's+mirror.centos.org/$contentdir+mirrors.ustc.edu.cn/centos+ ...
1. https://www.linuxtechi.com/install-openstack-centos-8-with-packstack/ (Following which noted) 2. https://computingforgeeks.com/install-openstack-victoria-on-centos ...