On 01/07/2019 19:35, N Vivekanandan wrote: > Hi Team, Hello,
[+neutron-dev, see below] > Can you please let us know if its possible to provide an enhanced API > from RestConfImpl, where we can request that the > datastore-change-notifications be JSON Wrapped and sent only from one > node of an MD-SAL cluster? > > > > For example, the port-status change listener subscribes to send > websocket notifications on all the 3 nodes in our MD-SAL Cluster. This is the problem: why do you register on all nodes? If you do, you have three streams and it is *your* responsibility to synchronize/deduplicate them. > This results in same port-status notifications sent 3 times on every > change in the status of the neutron port in the ODL Controller. > > > > We wanted to send just “one port-status notification per status change > on the port” towards the Openstack services from the ODL controller. > > > > Can you please let us know if there is a simpler way that we would be > able to send websocket notifications from only one MD-SAL cluster > > node towards openstack within the RestConfImpl? > > > > We thought of using EOS (EntityOwnershipService), but looks we have to > resubscribe to the stream everytime on the new node which Got a pointer to a patch? > becomes an EOS leader due to elections in a running cloud, and this > resubscribing to the stream may resend tons of notifications towards > > Openstack on a scaled cloud with about 6000 ACTIVE ports. > > > > https://github.com/opendaylight/neutron/blob/master/northbound-api/src/main/java/org/opendaylight/neutron/northbound/impl/PortStatusUpdateInitializer.java > ... I am not quite getting why neutron is talking to RESTCONF instead of directly to MD-SAL here. Then, obviously, neutron can use ClusterDataTreeChangeListener coupled with Cluster Singleton Service to provide proper subscription service. Regards, Robert
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