What is your definition of large? This is a difficult question to answer without more details.
On Wed, Mar 26, 2014 at 7:08 PM, Stuart Longland <stua...@vrt.com.au> wrote: > On 18/03/14 02:35, Gandalf Corvotempesta wrote: > > Hi to all > > i'm planning a brand new cloud infrastructure with opennebula. > > I'll have many KVM nodes and 3 "management nodes" where I would like > > to place OpenNebula, Sunstone and something else used to orchestrate > > the whole infrastructure > > > > Simple question: can I use these 3 nodes to power on OpenNebula (in > > HA-Configuration) and also host some virtual machines managed by > > OpenNebula ? > > I could be wrong, I'm new to OpenNebula myself, but from what I've seen, > the management node isn't a particularly heavyweight process. > > I had it running semi-successfully on an old server here (pre > virtualisation-technology). I say semi-successfully; the machine had a > SCSI RAID card that took a dislike to Ubuntu 12.04, so the machine I had > as the master would die after 8 hours. > > I was using SSH based transfers (so no shared storage) at the time. > > Despite this, the VMs held up, they just couldn't be managed. This > won't be the case if your VM hosts mount any space off the frontend > node: in which case a true HA set-up is needed. (And lets face it, I > wouldn't recommend running the master node as a VM if you're going to be > mounting storage directly off it for the hosts.) > > Based on this it would seem you could do a HA setup with some shared > storage between the nodes, either a common SAN or DR:BD to handle the > OpenNebula frontend. > > Seeing as OpenNebula will want to control libvirt on the hosts (being > that you're also suggesting making these run the OpenNebula-managed VMs > too, this might have to be a KVM process managed outside of libvirt. > Not overly difficult, just fiddly. > > But, as I say, I could be wrong, so take the above advice with a grain > of salt. > > Regards, > -- > Stuart Longland > Systems Engineer > _ ___ > \ /|_) | T: +61 7 3535 9619 > \/ | \ | 38b Douglas Street F: +61 7 3535 9699 > SYSTEMS Milton QLD 4064 http://www.vrt.com.au > > > _______________________________________________ > Users mailing list > Users@lists.opennebula.org > http://lists.opennebula.org/listinfo.cgi/users-opennebula.org >
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