On Mon, Mar 28, 2011 at 9:08 PM, Miles Fidelman <mfidel...@meetinghouse.net> wrote: > 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???!!!!)
I can only comment on Pacemaker: I think so, but you haven't indicated which versions > - 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 > Linux-HA@lists.linux-ha.org > http://lists.linux-ha.org/mailman/listinfo/linux-ha > See also: http://linux-ha.org/ReportingProblems > _______________________________________________ Linux-HA mailing list Linux-HA@lists.linux-ha.org http://lists.linux-ha.org/mailman/listinfo/linux-ha See also: http://linux-ha.org/ReportingProblems
