Here are some links:
https://github.com/ibmcb/cbtool
It is very easy to start using cloudbench. I suggest that you setup an Ubuntu VM and download code from github. Follow the instructions to setup first instance. It will be ideal, if you have your own cloud. It could be as simple as running all components of OpenStack inside a VM. So, in total, you will need two VMs to for the first run. One Ubuntu VM with cloudbench, and another RHEL VM with OpenStack installed.
https://github.com/brianfrankcooper/YCSB/wiki/Running-a-Workload