Heads-up: possible Jewel/Kraken RBD compatibility issue that might impact users doing rolling upgrades

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Hi everyone,

just a quick heads-up on this issue: http://tracker.ceph.com/issues/19889

TL;DR: "rbd import" looks like it breaks when upgrading a cluster from
Jewel to Kraken (and potentially, Luminous — not sure about that) and
before upgrading the client itself. In other words, this might cause
disruption in upgrades with clients using "rbd import"-like
functionality (such as OpenStack Glance).

Cheers,
Florian
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