1 installing the Rocky release on all nodes. yum install centos-release-openstack-rocky 安装之后,会在/etc/yum.repos.d/下产生CentOS-OpenStack-rocky.repo,CentOS-Ceph-Luminous.repo,CentOS-QEMU-EV.repo,CentOS-Storage-common.repo这4个yum源,由于centos官方已经无rocky版本的安装包了,建…