The requirement for 3 Controller Nodes comes from the use of MySQL Galera Clustering, it requires a minimum of 3 nodes to minimize split brain. Tho, there is a way to run it with two, where you run a service to act as a third voting member of the cluster, just would not contain or respond to any sql queries.
On Wed, Apr 9, 2014 at 10:11 AM, Alexandre De Carvalho < [email protected]> wrote: > Hi, > > I don't understand why we need 3 Controllers Nodes to do HA. > > It's not possible to do that with 2 Controllers Nodes ? > > > Thanks > > -- > Best regards, > Alexandre > > > > _______________________________________________ > Mailing list: > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack > Post to : [email protected] > Unsubscribe : > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack > >
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