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Guillaume Abrioux authored
Refact the mds cluster upgrade code in order to follow the documented recommandation. See: https://github.com/ceph/ceph/blob/luminous/doc/cephfs/upgrading.rst Closes: https://bugzilla.redhat.com/show_bug.cgi?id=1569689 Signed-off-by: Guillaume Abrioux <gabrioux@redhat.com> (cherry picked from commit 71cebf80)
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