Fwd: Question on rbd maps

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Hello,

Is there a way to find out all the clients where the volumes are mapped
from a central point?

We have a large fleet of machines that use ceph rbd volumes. For some
maintenance purposes, we need to find out if a volume is mapped anywhere
before acting on it. Right now we go and query each client machines with
`rbd showmapped` commands. Is there a variant of this CLI that lists all
mappings on a single node (ceph mon for instance)?

Thanks,
Shridhar
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