Ceph » rbd

http://qa-proxy.ceph.com/teuthology/trociny-2021-02-09_07:56:42-rbd-wip-mgolub-testing-distro-basic-smithi/5870969/teuthology.log

In the example above, mirroring was disabled on "image_4" but the remote site failed to delete the image. The rbd-mirror daemon on the remote site noticed the image was no longer mirrored and attempted to remove it, but in "BootstrapRequest<I>::handle_prepare_remote_image", the "is_linked" boolean evaluated to false which prevented returning the error code to indicate the image should be deleted:

remote image does not exist: local_image_id=155ffd1f1dd1, remote_image_id=, is_linked=0

The reason "is_linked" was false was because when retrieving the local mirror info, the promotion state was UNKNOWN because it didn't have a non-primary mirror snapshot available:

handle_get_mirror_info: local_image_id=155ffd1f1dd1, local_promotion_state=0, local_primary_mirror_uuid=

The reason for the missing snapshot was because the snapshot will only be created by "snapshot::Replayer" when performing the initial sync and the rbd-mirror daemon that initially create the image was shut down by the thrasher. Therefore, we either need to delay the updating of the mirror image state to keep it in the CREATING state until the first non-primary snapshot is created, or "librbd::mirror::EnableRequest" needs to create the non-primary snapshot to be pruned later by the replayer.