On Mon, Oct 21, 2019 at 8:03 AM <yveskretzschmar@web.de> wrote:

Hi,

I have a working RBD Mirror Setup using ceph version 14.2.4 on both sides. I want to have a clone of a non primay image.

I do it this way:

1. create snapshot of primary image 2. wait for the snapshot to appear on the backup cluster 3. create a clone in backup cluster (using Simplified RBD Image Cloning - no snap protect) 4. delete the snapshot of the primary image - this is to save space because the clone will last a long time 5. if I do rbd --cluster backup snap ls --all IMAGENAME it presents the deleted snapshot in the namespace trash 6. delete the clone 7. I expected that deleting the clone would purge the snapshot from trash, but it doesn't 8. trash purge or trash remove is impossible (read only filesystem)

Only possbility for me to purge the trash is to disable und reenable the image mirror.

Is there something wrong in this order. Essential for me is the snaphot removal of the primary image. Flatten the clone is no option because of space.

Hmm, this is a clever edge case that was never thought of when adding support for clones against non-primary images and v2 cloning w/ the trash namespace. I opened a tracker ticket for the issue [1].

Regards, Yves _______________________________________________ ceph-users mailing list -- ceph-users@ceph.io To unsubscribe send an email to ceph-users-leave@ceph.io

[1] https://tracker.ceph.com/issues/42405 -- Jason