Hello all, A while ago I came across a Ceph cluster with a RBD volume missing the header object describing the characteristics of the volume, making it impossible to attach or perform any operations on said volume.
As a courtesy to anyone else encountering the same situation I would like to share how I solved this: http://fnordahl.com/2017/04/17/ceph-rbd-volume-header-recovery/ -- Frode Nordahl
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