Hello,I'm using Ceph as Cinder backend. Actually it's working pretty well and some users are using this cloud platform for few weeks, but I come back from vacation and I've got some errors removing volumes, errors I didn't have few weeks ago.
Here's the situation :Volumes are unattached, but Ceph is telling Cinder or I, when I try to remove trough rbd tools, that the volume still has watchers.
rbd --pool cinder rm volume-46e241ee-ed3f-446a-87c7-1c9df560d770 Removing image: 99% complete...failed. rbd: error: image still has watchersThis means the image is still open or the client using it crashed. Try again after closing/unmapping it or waiting 30s for the crashed client to timeout. 2013-08-20 19:17:36.075524 7fedbc7e1780 -1 librbd: error removing header: (16) Device or resource busy
The kvm instances on which the volumes have been attached are now terminated. There's no lock on the volume using 'rbd lock list'.
I restarted all the monitors (3) one by one, with no better success. From Openstack PoV, these volumes are well unattached.How can I unlock the volumes or trace back the watcher/process ? These could be on several and different compute nodes.
Thank you for any hint,
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