Hi Dmitri, I confirm Simon's statament that you can't do what you're suggesting due to OpenNebula's cache mechanism.
However, we have recently found out scalability issues for large deployments, where the xmlrpc server is a bottleneck. In the next OpenNebula release we will provide configuration parameters to dramatically improve the xmlrpc server performance, which will probably make it unnecessary to load-balance the frontend as you described. Regards, Jaime On Thu, Aug 1, 2013 at 11:32 AM, Simon Boulet <[email protected]> wrote: > Hi Dmitri, > > On Thu, Aug 1, 2013 at 11:25 AM, Dmitri Chebotarov <[email protected]>wrote: > >> >> Are there any issue with load balancing OpenNebula controller nodes? >> > > I don't think it's currently possible because oned caches states and > information directly in memory. If you were to run two instances of oned > (even if they are connected to the same database) states would become > inconsistent between the two. One solution would be to have an option in > OpenNebula to drop caching from oned (and relay on the backend database > directly). > > However I think having a load balanced Sunstone all instances connected to > the same oned XML-RPC endpoint would work. > > Simon > > > > _______________________________________________ > Users mailing list > [email protected] > http://lists.opennebula.org/listinfo.cgi/users-opennebula.org > > -- Join us at OpenNebulaConf2013 <http://opennebulaconf.com/> in Berlin, 24-26 September, 2013 -- Jaime Melis Project Engineer OpenNebula - The Open Source Toolkit for Cloud Computing www.OpenNebula.org | [email protected]
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