[ovirt-users] Upgrading librbd1 and librados2 for oVirt 4.2.x

Hello, I am in need of upgrading librbd1 and librados2 for a oVirt 4.2.x cluster. The cluster was installed via node ng. Taking the repository for Ceph Mimic or Luminous will end with a dependency problem because liburcu-cds.so.1 is already installed as a more recent version. A hint on how to get a more recent versions of the above libraries would be very much appreciated. Thanks, - Andreas