crowbar/crowbar-ceph

def upgrade ta, td, a, d
  a["config"]["osds_in_total"] = ta["config"]["osds_in_total"]
  a["config"]["replicas_number"] = ta["config"]["replicas_number"]
  return a, d
end

def downgrade ta, td, a, d
  a["config"].delete("osds_in_total")
  a["config"].delete("replicas_number")
  return a, d
end