Learning Ceph - Second Edition

Server naming

This may seem trivial, but naming conventions for servers can be surprisingly controversial. Many Ceph deployments will use names like ceph-osd-01 and ceph-mon-03. Others have organizational conventions of naming systems after their serial numbers or by location, encoding a datacenter room, row, rack, and RU into a name like dh3a1r3ru42.example.com. While location-based hostnames may seem awkward, their appeal grows after repeated painful mistakes resulting from role-based hostnames:

• Adhesive hostname labels can fall off or become illegible over time
• Worse yet, they can be picked up and stuck onto the wrong server
• Repurposed systems can all too easily retain role-based labels from previous lives
• Different departments sharing ...