Ceph » rbd

I just upgraded from Kraken to Luminous. But after the upgrade, I started noticing that openstack-compute-node service was not able to do a clone (CoW) of some glance image/snapshot and thus was creating the base image on the root disk before doing an "rbd import".
Some images are still working fine, but some are not.

If you look at the example below, everything seems to be consistent (snapshot present) but when trying to do snap protect, I get an error where normally I should get something like "the snapshot is already protected". I was able to workaround that by recreating a snapshot (using snap create) and redoing the protect (using snap protect).

[root@os-controller01 ~(admin@nuagex-labs)]# rbd --name client.admin --pool glance-images snap protect --snap snap --image 3dc4dfda-223a-40eb-9a72-b820fc2d8d2f 
rbd: protecting snap failed: (2) No such file or directory

[root@os-controller01 ~(admin@nuagex-labs)]# qemu-img info rbd:glance-images/3dc4dfda-223a-40eb-9a72-b820fc2d8d2f:id=glance                                                                                                                   
image: rbd:glance-images/3dc4dfda-223a-40eb-9a72-b820fc2d8d2f:id=glance
file format: raw
virtual size: 20G (21474836480 bytes)
disk size: unavailable
Snapshot list:
ID        TAG                 VM SIZE                DATE       VM CLOCK
snap      snap                    20G 1969-12-31 19:00:00   00:00:00.000

[root@os-controller01 ~(admin@nuagex-labs)]# rbd --name client.glance --pool glance-images snap ls 3dc4dfda-223a-40eb-9a72-b820fc2d8d2f                                                                                                       
SNAPID NAME     SIZE TIMESTAMP 
   744 snap 20480 MB   

[root@os-controller01 ~(admin@nuagex-labs)]# rbd --name client.admin --pool glance-images info 3dc4dfda-223a-40eb-9a72-b820fc2d8d2f                                                                                                           
rbd image '3dc4dfda-223a-40eb-9a72-b820fc2d8d2f':
        size 20480 MB in 5120 objects
        order 22 (4096 kB objects)
        block_name_prefix: rbd_data.6a7eac2eb141f2
        format: 2
        features: layering, exclusive-lock, object-map, fast-diff, deep-flatten
        flags:

My image is now listing two snapshots with the same name, is there any issue with that ?

[root@os-controller01 ~(keystone_admin)]# rbd --name client.glance --pool glance-images snap ls 3dc4dfda-223a-40eb-9a72-b820fc2d8d2f 
SNAPID NAME     SIZE TIMESTAMP                
   744 snap 20480 MB                          
  1021 snap 20480 MB Thu Jun 14 23:18:40 2018