We have an Openstack which use Ceph for Cinder and Glance. Ceph is in Hammer release and we need to upgrade to Jewel. My question is : are the Hammer clients compatible with the Jewel servers ? (upgrade of Mon then Ceph servers first) As the upgrade of the Ceph client need a reboot of all the instances on each openstack hypervisor, we will have to keep for a while our client in hammer version Thanks for your help !
Vincent
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