[ceph-users] RBD-Mirror: snapshots automatically created?

Hi *,

I encountered a rather strange (or at least unexpected) behaviour of  
the rbd-mirror. Maybe I don't fully understand the feature so please  
correct me if my assumptions are wrong.

My two (virtual one-node) clusters are still on ceph version  
15.2.4-864-g0f510cb110 and the following happens if I'm trying to  
configure snapshot-based rbd-mirroring:

- I create a one-way replication from site A to site B
- Mirror mode is image (for snapshot-based mirroring)
- Import image on site A (no journal-feature enabled to make sure)
- Image is replicated as soon as I enable the mirror mode on that image with:
> rbd mirror image enable pool/image3 snapshot
- rbd info shows "snapshot_count: 1" although I haven't created a  
snapshot of this image yet, and there's also no schedule:

> siteA:~ # rbd mirror snapshot schedule ls
> siteA:~ #

This is the third image in this test, I only created one snapshot for  
image1, not for the other images. Is this expected? From the docs I  
assumed I have to either create snapshots manually or configure the  
rbd mirror snapshot schedule. Could anyone please clarify?

Thank you!
Eugen