On Wed, Mar 23, 2022 at 11:18:18PM +0200, Budai Laszlo <laszlo.budai@xxxxxxxxx> wrote: > After I map on the first host I can see its lock on the image. After that I was expecting the map to fail on the second node, but actually it didn't. The second node was able to map the image and take over the lock. > > How is this possible? What am I missing? Your old client is probably getting blocked from writing to the image: https://docs.ceph.com/en/latest/rbd/rbd-exclusive-locks/#blocklisting You can check for that with `ceph osd blocklist ls` or in older versions `ceph osd blacklist ls`. Florian
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