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*********************
OVSDB Manager library
*********************
Introduction
============
Ryu OVSDB Manager library allows your code to interact with devices
speaking the OVSDB protocol. This enables your code to perform remote
management of the devices and react to topology changes on them.
Example
=======
The following logs all new OVSDB connections and allows creating a port
on a bridge.
.. code-block:: python
import uuid
from ryu.base import app_manager
from ryu.controller.handler import set_ev_cls
from ryu.services.protocols.ovsdb import api as ovsdb
from ryu.services.protocols.ovsdb import event as ovsdb_event
class MyApp(app_manager.RyuApp):
@set_ev_cls(ovsdb_event.EventNewOVSDBConnection)
def handle_new_ovsdb_connection(self, ev):
system_id = ev.system_id
addr = ev.client.address
self.logger.info('New OVSDB connection from system id %s',
system_id)
self.logger.info('The connection address id %s',
addr)
def create_port(self, system_id, bridge_name, name):
new_iface_uuid = uuid.uuid4()
new_port_uuid = uuid.uuid4()
bridge = ovsdb.row_by_name(self, system_id, bridge_name)
def _create_port(tables, insert):
iface = insert(tables['Interface'], new_iface_uuid)
iface.name = name
iface.type = 'internal'
port = insert(tables['Port'], new_port_uuid)
port.name = name
port.interfaces = [iface]
bridge.ports = bridge.ports + [port]
return (new_port_uuid, new_iface_uuid)
req = ovsdb_event.EventModifyRequest(system_id, _create_port)
rep = self.send_request(req)
if rep.status != 'success':
self.logger.error('Error creating port %s on bridge %s: %s',
name, bridge, rep.status)
return None
return rep.insert_uuids[new_port_uuid]
|
