Yes, I'm afraid it sounds like it is. You can double check whether the
watch exists on an image by getting the id of the image from 'rbd info
$pool/$image | grep block_name_prefix':
block_name_prefix: rbd_data.105674b0dc51
The id is the hex number there. Append that to 'rbd_header.' and you
have the header object name. Check whether it has watchers with:
rados listwatchers -p $pool rbd_header.105674b0dc51
If that doesn't show any watchers while the image is in use by a vm,
it's #9806.
I just merged the backport for firefly, so it'll be in 0.80.11.
Sorry it took so long to get to firefly :(. We'll need to be
more vigilant about checking non-trivial backports when we're
going through all the bugs periodically.
Josh
On 07/21/2015 12:52 PM, Stefan Priebe wrote:
So this is really this old bug?
http://tracker.ceph.com/issues/9806
Stefan
Am 21.07.2015 um 21:46 schrieb Josh Durgin:
On 07/21/2015 12:22 PM, Stefan Priebe wrote:
Am 21.07.2015 um 19:19 schrieb Jason Dillaman:
Does this still occur if you export the images to the console (i.e.
"rbd export cephstor/disk-116@snap - > dump_file")?
Would it be possible for you to provide logs from the two "rbd export"
runs on your smallest VM image? If so, please add the following to
the "[client]" section of your ceph.conf:
log file = /valid/path/to/logs/$name.$pid.log
debug rbd = 20
I opened a ticket [1] where you can attach the logs (if they aren't
too large).
[1] http://tracker.ceph.com/issues/12422
Will post some more details to the tracker in a few hours. It seems it
is related to using discard inside guest but not on the FS the osd is
on.
That sounds very odd. Could you verify via 'rados listwatchers' on an
in-use rbd image's header object that there's still a watch established?
Have you increased pgs in all those clusters recently?
Josh
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