def notify(self, event, row, updates=None):
self.handle_db_schema_changes(event, row)
self.notify_handler.notify(event, row, updates, global_=True)
try:
target_node = self._hash_ring.get_node(str(row.uuid))
except exceptions.HashRingIsEmpty as e:
LOG.error('HashRing is empty, error: %s', e)
return
if target_node != self._node_uuid:
return
# If the worker hasn't been health checked by the maintenance
# thread (see bug #1834498), indicate that it's alive here
time_now = timeutils.utcnow()
touch_timeout = time_now - datetime.timedelta(
seconds=ovn_const.HASH_RING_TOUCH_INTERVAL)
if not self._last_touch or touch_timeout >= self._last_touch:
# NOTE(lucasagomes): Guard the db operation with an exception
# handler. If heartbeating fails for whatever reason, log
# the error and continue with processing the event
try:
ctx = neutron_context.get_admin_context()
ovn_hash_ring_db.touch_node(ctx, self._node_uuid)
self._last_touch = time_now
except Exception:
LOG.exception('Hash Ring node %s failed to heartbeat',
self._node_uuid)
LOG.debug('Hash Ring: Node %(node)s (host: %(hostname)s) '
'handling event "%(event)s" for row %(row)s '
'(table: %(table)s)',
{'node': self._node_uuid, 'hostname': CONF.host,
'event': event, 'row': row.uuid, 'table': row._table.name})
self.notify_handler.notify(event, row, updates)
def test_touch_node(self):
nodes = self._add_nodes_and_assert_exists(count=3)
# Assert no nodes were updated yet
for node in nodes:
node_db = self._get_node_row(node)
self.assertEqual(node_db.created_at, node_db.updated_at)
# Touch one of the nodes
ovn_hash_ring_db.touch_node(self.admin_ctx, nodes[0])
# Assert it has been updated
node_db = self._get_node_row(nodes[0])
self.assertGreater(node_db.updated_at, node_db.created_at)
# Assert the other two nodes hasn't been updated
for node in nodes[1:]:
node_db = self._get_node_row(node)
self.assertEqual(node_db.created_at, node_db.updated_at)
