i have a two-node HA-Cluster(pacemaker, corosync) with SLES 12 SP4.
I'm thinking of upgrading to SLES 15 SP1 because of the more recent pacemaker and corosync Software.
I'd like to avoid a fresh install because it takes considerable time. On the other hand i always preferred fresh installations and only upgraded from SPx to SPy, but never to a new Major Release. What are your experiences ? Suse itself isn't certain what to do. They recommend to do a fresh installation for a new Major Release, but the Upgrade-Path from 12 SP4 to 15 SP1 is supported. Does anyone tried a Upgrade installation ?