rhnlib from systemsmanagement:Uyuni:Master:CentOS7-Uyuni-Client-Tools project
Select Your Operating System
Add repository and install manually
For CentOS 7 run the following as root:
cd /etc/yum.repos.d/ wget https://download.opensuse.org/repositories/systemsmanagement:Uyuni:Master:CentOS7-Uyuni-Client-Tools/CentOS_7/systemsmanagement:Uyuni:Master:CentOS7-Uyuni-Client-Tools.repo yum install rhnlib