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
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