I know that only a few are using this script but just trying my luck here if someone has the same issue as mine. But first, who has successfully used this script and what version did you use? Im using this guide on my test environment ( https://access.redhat.com/documentation/en-us/red_hat_ceph_storage/3/html/in... ) Error encountered --- TASK [Generate ceph configuration file] ********************************************************************** *********************************************************************************** fatal: [vladceph-1]: FAILED! => msg: '''_monitor_addresses'' is undefined. ''_monitor_addresses'' is undefined' fatal: [vladceph-3]: FAILED! => msg: '''_monitor_addresses'' is undefined. ''_monitor_addresses'' is undefined' fatal: [vladceph-2]: FAILED! => msg: '''_monitor_addresses'' is undefined. ''_monitor_addresses'' is undefined' --- Regards, Vlad Blando <https://about.me/vblando>