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Learning Ceph - Second Edition by Karan Singh, Vaibhav Bhembre, Anthony D'Atri

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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 ...

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