A forthcoming profile needs to set the I/O scheduler to noop/none on the disks backing ceph OSDs, so Puppet must know which block devices those are. This fact surfaces them by inspecting LVM PVs whose volume group belongs to ceph.
- add ceph_osd_devices fact returning the sorted array of PV device paths whose VG name starts with ceph-
- confine the fact to physical Linux hosts with pvs installed so it never resolves on VMs
https://claude.ai/code/session_01JUoARVdmhxKQHyyyp1pxeT
Reviewed-on: #504
Co-authored-by: Ben Vincent <ben@unkin.net>
Co-committed-by: Ben Vincent <ben@unkin.net>
