During on of tests, my test client painfully crashed with a couple of
mapped images. When it came back online I have not been able to rm
formerly mapped images as watchers were still registered.
Host A > rbd create test-image --size 10240
Host A > rbd map test-image
# <terrible crash followed by hard reboot>
# after some time > 30sec Host A is back online
Host A > rbd rm test-image
# > Removing image: 99% complete...failed.2014-01-30 17:07:37.607497 #
> 7f26468b3760 -1 librbd: error removing header: (16) Device or
resource busy
# >
# > rbd: error: image still has watchers
# > This 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.
And indeed I do have registered watcher:
Host A > rados listwatchers --pool rbd test-image.rbd
watcher=1.2.3.4:0/4224017245 client.15347 cookie=110
# Hey, this is *my* ip address !
But
Host A > rbd showmapped
# Nothing here
Is there anything I can do to fix this situation (cleanly) ?
--
Jean-Tiare, shared-hosting team
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