Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Have you considered a HA NFS over a 2-node DRBD8 cluster ? Should work well on most hypervisors (qcow2,raw,vmdk based). Yannis On 26 Aug 2017 12:16, "A.Rubio" <aurusa at etsii.upv.es> wrote: > Hi all. > > I writted a book about this every years ago for a course. > > The book is about pacemaker, drbd, gfs2 and kvm, for 2 nodes and for many > nodes. > > It's writted in spanish because my english is poor (it's evident :-() > > http://www.lulu.com/shop/aurelio-rubio-sapi%C3%B1a-and-juan- > vicente-capella-hern%C3%A1ndez/pacemaker-clusters-de-alta- > disponibilidad-para-servidores-virtualizados/ebook/product-22274638.html > > If yo want a copy and you can't buy it ;-), You write to my. I don't have > problem send you the ebook. > > > El 25/08/2017 a las 22:18, Digimer escribió: > >> On 2017-08-25 04:08 PM, Gionatan Danti wrote: >> >>> Il 25-08-2017 22:01 Digimer ha scritto: >>> >>>> On 2017-08-25 03:37 PM, Gionatan Danti wrote: >>>> >>>> The overhead of clustered locking is likely such that your VM >>>> performance would not be good, I think. >>>> >>> Mmm... I need to do some more testing with fio, it seems ;) >>> >>> With raw clustered LVs backing the servers, you don't need cluster >>>> locking on a per-IO basis, only on LV create/change/delete. Because LVM >>>> is sitting on top of DRBD (in dual-primary), live-migration is no >>>> trouble at all and performance is good, too. >>>> >>> True. >>> >>> GFS2, being a cluster FS, will work fine if a node is lost, provided it >>>> is fenced succesfully. It's wouldn't be much of a cluster-FS >>>> otherwise. :) >>>> >>> So no problem with quorum? A loss of a system in a two-node cluster >>> seems to wreack havok on other cluster filesystems (Gluster, for >>> example...) >>> >>> Thanks. >>> >> Quorum is optional (an often misunderstood thing). >> >> https://www.alteeve.com/w/The_2-Node_Myth >> >> We've run without quorum for every system we've built over 5+ years, >> across dozens of sites and never once needed it. A proper fence setup, >> which is needed regardless, is fine. In our opinion, the complexity of a >> third quorum node is not justified for the limited benefit of quorum. >> Simplicity is simply too valuable in HA. >> >> > _______________________________________________ > drbd-user mailing list > drbd-user at lists.linbit.com > http://lists.linbit.com/mailman/listinfo/drbd-user > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.linbit.com/pipermail/drbd-user/attachments/20170826/d726f94e/attachment.htm>