Hi, It is not a good idea, the oned/sched daemons assumes exclusive use of the cluster nodes (a.k.a hypervisors). As pointed by Lars you may end with overcommited memory/CPU.
My proposal here would be to use clusters. Define a couple of cluster (e.g. demos, production, develop) and assign hypervisor (onecluster command) to them as you need. Then VMs will be placed in the corresponding cluster using REQUIREMENTS="CLUSTER=demo" for example. This requires users to assume that model and place the REQUIREMENTS string in the VM templates. There is no straight forward solution for networks as discussed in a separate thread. Next release, will include groups + ACLs + VM template pool that will help you to easily implement these use cases... Cheers Ruben On Tue, May 3, 2011 at 9:42 PM, Lars Kellogg-Stedman <[email protected]>wrote: > > Does anyone have any experience with this type of configuration or is it > > even possible with OpenNebula? > > We were just discussing this model for our use earlier today as a way > of working around the lack of a granular authorization model. Our use > case is that we want to have some networks only available to our IT > staff, while making other networks available for course and research > use. At first glance, there's nothing to stop you from deploying > multiple OpenNebula servers pointing at the same backend hosts, but > you're going to find it difficult to control resource (primarily CPU > and memory) utilization since the two instances won't be aware of each > other. In theory you could adjust for this by limiting the total > resources available to each server, but I'm not sure off the top of my > head if this is actually possible. > > We may ultimately go with shared accounts (e.g., everyone in IT > authenticates as the "IT" user, and everyone in CS50 authenticates as > the "CS50" user) -- unless the forthcoming release addresses some of > these issues. > > -- > Lars Kellogg-Stedman <[email protected]> > Senior Technologist > Harvard University SEAS > Academic and Research Computing (ARC) > _______________________________________________ > Users mailing list > [email protected] > http://lists.opennebula.org/listinfo.cgi/users-opennebula.org > -- Dr. Ruben Santiago Montero Associate Professor (Profesor Titular), Complutense University of Madrid URL: http://dsa-research.org/doku.php?id=people:ruben Weblog: http://blog.dsa-research.org/?author=7
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