monitor server for the ceph storage system

 Ceph is a massively scalable, open-source, distributed
 storage system that runs on commodity hardware and delivers object,
 block and file system storage.
 .
 This package contains the cluster monitor daemon for the Ceph storage
 system. One or more instances of ceph-mon form a Paxos part-time parliament
 cluster that provides extremely reliable and durable storage of cluster
 membership, configuration, and state.