Hi, On Wed, Feb 5, 2014 at 5:31 PM, Sharuzzaman Ahmat Raslan < sharuzza...@gmail.com> wrote:
> Hi all, > > My last interaction with Opennebula is with the version 3.8 > > In that version, the frontend can only be running by a single node. To > have a redundancy, it was advised to have the frontend to be configured > using HA tools, such as Red Hat cluster suite. See > http://archives.opennebula.org/documentation:archives:rel4.2:oneha > > I believe that kind of setup is not optimal, as you have to bolt in > another subsystem, that could potentially become another head ache to > maintain. > > As alternative to external clustering system, I would like to highlight to > the developers the availability of Raft Consensus Algorithm. See > http://raftconsensus.github.io/ > > This algorithm can help to maintain the availability of the frontend, in a > fault-tolerant distributed system. With this algorithm, frontend can be run > on the VM nodes itself, where at any given time, one of the nodes will act > as a frontend for the whole cluster. If that "leader" node goes down, any > other node will step up to become the next leader, and maintaining the > availability of the frontend > > This can help simplify deployment, and reduce the requirement to have a > dedicated frontend machine, with another failover machine in standby > > I hope this idea could be discussed futher, and implemented on the future > release of Opennebula. > > thanks. > > -- > Sharuzzaman Ahmat Raslan > > Thank you for your suggestion. This may be useful not only for HA, but also for the new OpenNebula federation, where we need to have a master and several slaves. For the first version (that will be included in 4.6) the master will be set manually, but at some point we'll need to think of a way to deal with master selection. Best regards -- Carlos Martín, MSc Project Engineer OpenNebula - Flexible Enterprise Cloud Made Simple www.OpenNebula.org <http://www.opennebula.org/> | cmar...@opennebula.org | @OpenNebula <http://twitter.com/opennebula> <cmar...@opennebula.org>
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