Hi Folks, I'm getting ready to upgrade a 2-node HA cluster from Debian Etch to Squeeze. I'd very much appreciate any suggestions regarding "gotchas" to avoid, and so forth.
Basic current configuration: - 2 vanilla Intel-based servers, 4 SATA drives each - each machine: disks set up as 4-drive md10, LVM - xen 3.2 hypervisor, Debian Etch Dom0 - DRBD 8.2, Pacemaker linking the two nodes - several Debian Etch DomUs Target configuration: - update to xen 4.1, Debian Squeeze Dom0 - update to latest DRBD, Pacemaker - update DomUs on a case-by-case basis The most obvious question: Are later versions of Xen, DRBD, Pacemaker compatible with the older ones? I.e., can I take the simple approach: - migrate all DomUs to one machine - take the other machine off-line - upgrade Debian, Xen, DRBD, Pacemaker on the off-line node - bring that node back on-line (WILL THE NEW VERSIONS OF XEN, DRBD, PACEMAKER SYNC WITH THE PREVIOUS RELEASES ON THE OTHER NODE???!!!!) - migrate stuff to the updated node - take the 2nd node off-line, update everything, bring it back up, resync 1. Will that work? (If not: Alternative suggestions?) 2. Anything to watch out for? 3. As an alternative, does it make sense to install Ganeti and use it to manage the cluster? If so, any suggestions on a migration path? (Yes, it would be easier if I had one or two additional servers to use for intermediate staging, but such is life.) Thanks Very Much, Miles Fidelman -- In theory, there is no difference between theory and practice. In<fnord> practice, there is. .... Yogi Berra _______________________________________________ Linux-HA mailing list [email protected] http://lists.linux-ha.org/mailman/listinfo/linux-ha See also: http://linux-ha.org/ReportingProblems
