Hi,

• OpenStack Xena is Unmaintained, Ussuri is End Of Life (https://releases.openstack.org/) - probably the packages have been archived. Consider using more recent versions.
  
• Regarding the OS, RDO is tested on CentOS Stream, not on other distros (https://www.rdoproject.org/rdo/release-cadence/)

Best regards

The Centos system has stopped updating now, and we hope that the official website manual Centos can be changed to Rocky Linux. Now we are using Rocky Linux to install OpenStack using the Centos system installation method. Among them, the installation source link for yum install Centos release openstack ussuri and yum install Centos release openstack xena is invalid. We hope to receive your solution.

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ゞPositive ? 451526204@qq.com