On Thu, Jul 14, 2016 at 9:34 AM, Alexey I. Froloff <ra...@raorn.name> wrote:
> Greetings, > > We're about to use OVN in a large production environment :-) > > Well, not really "production" production, but having fun testing > it, looking if we can use it in such way. While functionality is > good for us, two question appear - scalability and availability. > > What are current OVN (as of master branch) limitations in > hypervisors in one segment (one SBDB), lswitches in one segment, > lports in one lswitch, etc? > > About clustering. Since ovn-northd does not support clustering > by itself, it is possible to create active-passive HA cluster > ising third-party clustering software. NBDB and SBDB are > replicated using ovsdb mechanisms and clustering software ensures > that there are one copy of ovn-northd daemon is running. Is this > correct? Can ovn-controller's automatically switch to different > database server? > There may be multiple possible ways to deploy OVN in a production environment, an OVN release probably should be able support at least one, and probably document other use cases OVN can support. In the long run, we'd like etcd to be actual database for NBDB and SBDB, but the work is not going to land in 2.6.0 For 2.6.0, OVSDB server already has the ability to replicate transactions from an active server to an stand-by server. contributed by Mario Cabrera from hpe.com. We plan to make use of this feature for 2.6.0 release. This is what I think may work at a high level, ovn-northd and ovn-controller should be told about both active and backup servers and only connect to the active server initially. When the connections to the active ovsdb server are lost, they will try to establish connections to the back up server, and confirm that the back up server is now an active server, then continue to issue transactions from that point on. We would like the default OVN HA clustering solution not require additional software, in order to reduce overall system complexity. The above functions have not been flushed out nor implemented. Feedbacks are welcome. > What clustering/HA/scalability features are planned for 2.6.0 > release? > Would above plan, or something similar be sufficient? > > Thank you in advance. > > -- > Regards, -- > Sir Raorn. --- https://plus.google.com/+AlexeyFroloff > > _______________________________________________ > discuss mailing list > discuss@openvswitch.org > http://openvswitch.org/mailman/listinfo/discuss > >
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