congress/congress/tests/dse2/test_dse2.py

509 lines
21 KiB
Python

# Copyright (c) 2013 VMware, Styra. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
#
import mock
import novaclient
import time
from oslo_config import cfg
cfg.CONF.distributed_architecture = True
from oslo_messaging import conffixture
from congress.datalog import compile
from congress.datasources import nova_driver
from congress import exception as congressException
from congress.policy_engines import agnostic
from congress.tests import base
from congress.tests import fake_datasource
from congress.tests import helper
class TestDSE(base.TestCase):
def setUp(self):
super(TestDSE, self).setUp()
mc_fixture = conffixture.ConfFixture(cfg.CONF)
mc_fixture.conf.transport_url = 'kombu+memory://'
self.messaging_config = mc_fixture.conf
self.messaging_config.rpc_response_timeout = 1
def test_intranode_pubsub(self):
node = helper.make_dsenode_new_partition('testnode')
test1 = fake_datasource.FakeDataSource('test1')
test2 = fake_datasource.FakeDataSource('test2')
node.register_service(test1)
node.register_service(test2)
test1.subscribe('test2', 'p')
helper.retry_check_function_return_value(
lambda: hasattr(test1, 'last_msg'), True)
test2.publish('p', 42)
helper.retry_check_function_return_value(
lambda: test1.last_msg['data'], 42)
self.assertFalse(hasattr(test2, "last_msg"))
def test_intranode_pubsub2(self):
# same as test_intranode_pubsub but with opposite ordering.
# (Ordering does matter with internode_pubsub).
node = helper.make_dsenode_new_partition('testnode')
test1 = fake_datasource.FakeDataSource('test1')
test2 = fake_datasource.FakeDataSource('test2')
node.register_service(test1)
node.register_service(test2)
test2.subscribe('test1', 'p')
helper.retry_check_function_return_value(
lambda: hasattr(test2, 'last_msg'), True)
test1.publish('p', 42)
helper.retry_check_function_return_value(
lambda: test2.last_msg['data'], 42)
self.assertFalse(hasattr(test1, "last_msg"))
def test_intranode_partial_unsub(self):
node = helper.make_dsenode_new_partition('testnode')
test1 = fake_datasource.FakeDataSource('test1')
test2 = fake_datasource.FakeDataSource('test2')
node.register_service(test1)
node.register_service(test2)
test1.subscribe('test2', 'p')
test1.subscribe('test2', 'q')
test1.unsubscribe('test2', 'q') # unsub from q should not affect p
helper.retry_check_function_return_value(
lambda: hasattr(test1, 'last_msg'), True)
test2.publish('p', 42)
helper.retry_check_function_return_value(
lambda: test1.last_msg['data'], 42)
self.assertFalse(hasattr(test2, "last_msg"))
def test_internode_pubsub(self):
node1 = helper.make_dsenode_new_partition('testnode1')
test1 = fake_datasource.FakeDataSource('test1')
node1.register_service(test1)
node2 = helper.make_dsenode_same_partition(node1, 'testnode2')
test2 = fake_datasource.FakeDataSource('test2')
node2.register_service(test2)
test1.subscribe('test2', 'p')
helper.retry_check_function_return_value(
lambda: hasattr(test1, 'last_msg'), True)
test2.publish('p', 42)
helper.retry_check_function_return_value(
lambda: test1.last_msg['data'], 42)
self.assertFalse(hasattr(test2, "last_msg"))
def test_internode_partial_unsub(self):
node1 = helper.make_dsenode_new_partition('testnode1')
node2 = helper.make_dsenode_same_partition(node1, 'testnode2')
test1 = fake_datasource.FakeDataSource('test1')
test2 = fake_datasource.FakeDataSource('test2')
node1.register_service(test1)
node2.register_service(test2)
test1.subscribe('test2', 'p')
test1.subscribe('test2', 'q')
test1.unsubscribe('test2', 'q') # unsub from q should not affect p
helper.retry_check_function_return_value(
lambda: hasattr(test1, 'last_msg'), True)
test2.publish('p', 42)
helper.retry_check_function_return_value(
lambda: test1.last_msg['data'], 42)
self.assertFalse(hasattr(test2, "last_msg"))
def test_multiservice_pubsub(self):
node1 = helper.make_dsenode_new_partition('testnode1')
test1 = fake_datasource.FakeDataSource('test1')
test2 = fake_datasource.FakeDataSource('test2')
node1.register_service(test1)
node1.register_service(test2)
node2 = helper.make_dsenode_same_partition(node1, 'testnode2')
test3 = fake_datasource.FakeDataSource('test3')
node2.register_service(test3)
test1.subscribe('test3', 'p')
helper.retry_check_function_return_value(
lambda: hasattr(test1, 'last_msg'), True)
test3.publish('p', 42)
helper.retry_check_function_return_value(
lambda: test1.last_msg['data'], 42)
self.assertFalse(hasattr(test2, "last_msg"))
self.assertFalse(hasattr(test3, "last_msg"))
def test_subscribe_snapshot(self):
node = helper.make_dsenode_new_partition('testnode')
test1 = fake_datasource.FakeDataSource('test1')
test2 = fake_datasource.FakeDataSource('test2')
node.register_service(test1)
node.register_service(test2)
test1.subscribe('test2', 'fake_table')
helper.retry_check_function_return_value(
lambda: hasattr(test1, 'last_msg'), True)
self.assertEqual(test1.last_msg['data'], test2.state['fake_table'])
def test_datasource_sub(self):
node = helper.make_dsenode_new_partition('testnode')
nova_client = mock.MagicMock()
with mock.patch.object(novaclient.client.Client, '__init__',
return_value=nova_client):
nova = nova_driver.NovaDriver(
name='nova', args=helper.datasource_openstack_args())
test = fake_datasource.FakeDataSource('test')
node.register_service(nova)
node.register_service(test)
nova.subscribe('test', 'p')
helper.retry_check_function_return_value(
lambda: hasattr(nova, 'last_msg'), True)
test.publish('p', 42)
helper.retry_check_function_return_value(
lambda: nova.last_msg['data'], 42)
self.assertFalse(hasattr(test, "last_msg"))
def test_datasource_unsub(self):
node = helper.make_dsenode_new_partition('testnode')
nova_client = mock.MagicMock()
with mock.patch.object(novaclient.client.Client, '__init__',
return_value=nova_client):
nova = nova_driver.NovaDriver(
name='nova', args=helper.datasource_openstack_args())
test = fake_datasource.FakeDataSource('test')
node.register_service(nova)
node.register_service(test)
nova.subscribe('test', 'p')
helper.retry_check_function_return_value(
lambda: hasattr(nova, 'last_msg'), True)
test.publish('p', 42)
helper.retry_check_function_return_value(
lambda: nova.last_msg['data'], 42)
self.assertFalse(hasattr(test, "last_msg"))
nova.unsubscribe('test', 'p')
test.publish('p', 43)
# hard to test that the message is never delivered
time.sleep(0.2)
self.assertEqual(nova.last_msg['data'], 42)
def test_datasource_pub(self):
node = helper.make_dsenode_new_partition('testnode')
nova_client = mock.MagicMock()
with mock.patch.object(novaclient.client.Client, '__init__',
return_value=nova_client):
nova = nova_driver.NovaDriver(
name='nova', args=helper.datasource_openstack_args())
test = fake_datasource.FakeDataSource('test')
node.register_service(nova)
node.register_service(test)
test.subscribe('nova', 'p')
helper.retry_check_function_return_value(
lambda: hasattr(test, 'last_msg'), True)
nova.publish('p', 42)
helper.retry_check_function_return_value(
lambda: test.last_msg['data'], 42)
self.assertFalse(hasattr(nova, "last_msg"))
def test_datasource_poll(self):
node = helper.make_dsenode_new_partition('testnode')
node.always_snapshot = True # Note(ekcs): this test expects snapshot
pub = fake_datasource.FakeDataSource('pub')
sub = fake_datasource.FakeDataSource('sub')
node.register_service(pub)
node.register_service(sub)
sub.subscribe('pub', 'fake_table')
pub.state = {'fake_table': set([(1, 2)])}
pub.poll()
helper.retry_check_function_return_value(
lambda: sub.last_msg['data'], set(pub.state['fake_table']))
self.assertFalse(hasattr(pub, "last_msg"))
def test_policy_data(self):
"""Test policy correctly processes initial data snapshot."""
node = helper.make_dsenode_new_partition('testnode')
node.always_snapshot = False
data = fake_datasource.FakeDataSource('data')
engine = agnostic.Dse2Runtime('engine')
node.register_service(data)
node.register_service(engine)
engine.create_policy('policy1')
engine.create_policy('data')
self.insert_rule(engine, 'p(x) :- data:fake_table(x)', 'policy1')
data.state = {'fake_table': set([(1,), (2,)])}
data.poll()
helper.retry_check_db_equal(
engine, 'p(x)', 'p(1) p(2)', target='policy1')
self.assertFalse(hasattr(engine, "last_msg"))
def test_policy_data_update(self):
"""Test policy correctly processes initial data snapshot and update."""
node = helper.make_dsenode_new_partition('testnode')
node.always_snapshot = False
data = fake_datasource.FakeDataSource('data')
engine = agnostic.Dse2Runtime('engine')
node.register_service(data)
node.register_service(engine)
engine.create_policy('policy1')
engine.create_policy('data')
self.insert_rule(engine, 'p(x) :- data:fake_table(x)', 'policy1')
data.state = {'fake_table': set([(1,), (2,)])}
data.poll()
helper.retry_check_db_equal(
engine, 'p(x)', 'p(1) p(2)', target='policy1')
data.state = {'fake_table': set([(1,), (2,), (3,)])}
data.poll()
helper.retry_check_db_equal(
engine, 'p(x)', 'p(1) p(2) p(3)', target='policy1')
self.assertFalse(hasattr(engine, "last_msg"))
def test_policy_data_late_sub(self):
"""Test policy correctly processes data on late subscribe."""
node = helper.make_dsenode_new_partition('testnode')
node.always_snapshot = False
data = fake_datasource.FakeDataSource('data')
engine = agnostic.Dse2Runtime('engine')
node.register_service(data)
node.register_service(engine)
engine.create_policy('policy1')
engine.create_policy('data')
data.state = {'fake_table': set([(1,), (2,)])}
data.poll()
self.insert_rule(engine, 'p(x) :- data:fake_table(x)', 'policy1')
helper.retry_check_db_equal(
engine, 'p(x)', 'p(1) p(2)', target='policy1')
data.state = {'fake_table': set([(1,), (2,), (3,)])}
data.poll()
helper.retry_check_db_equal(
engine, 'p(x)', 'p(1) p(2) p(3)', target='policy1')
self.assertFalse(hasattr(engine, "last_msg"))
def insert_rule(self, engine, statement, target=None):
statement = compile.parse1(statement)
if target is None:
e = compile.Event(statement)
else:
e = compile.Event(statement, target=target)
engine.process_policy_update([e])
def test_unregister(self):
node = helper.make_dsenode_new_partition('testnode')
test1 = fake_datasource.FakeDataSource('test1')
node.register_service(test1)
obj = node.invoke_service_rpc(
'test1', 'get_status', {'source_id': None, 'params': None})
self.assertIsNotNone(obj)
node.unregister_service('test1')
helper.retry_til_exception(
congressException.NotFound,
lambda: node.invoke_service_rpc(
'test1', 'get_status', {'source_id': None, 'params': None}))
def _create_node_with_services(self, nodes, services, num, partition_id):
nid = 'cbd_node%s' % num
nodes.append(helper.make_dsenode_same_partition(partition_id, nid))
ns = []
for s in range(num):
# intentionally starting different number services
ns.append(
fake_datasource.FakeDataSource('cbd-%d_svc-%d' % (num, s)))
nodes[-1].register_service(ns[-1])
services.append(ns)
return nodes[-1]
def test_subs_list_update_aggregated_by_service(self):
part = helper.get_new_partition()
nodes = []
services = []
num_nodes = 3
for i in range(num_nodes):
n = self._create_node_with_services(nodes, services, i, part)
n.start()
# add subscriptions
for i in range(2, num_nodes):
for s2 in services[i]:
for s1 in services[i-1]:
s1.subscribe(s2.service_id, 'table-A')
s2.subscribe(s1.service_id, 'table-B')
services[1][0].subscribe(services[2][0].service_id, 'table-C')
services[2][1].subscribe(services[2][0].service_id, 'table-D')
# constructed expected results
expected_subbed_tables = {}
expected_subbed_tables[nodes[1].node_id] = {}
expected_subbed_tables[nodes[2].node_id] = {}
expected_subbed_tables[nodes[1].node_id][
services[1][0].service_id] = set(['table-B'])
expected_subbed_tables[nodes[2].node_id][
services[2][0].service_id] = set(['table-A', 'table-C', 'table-D'])
expected_subbed_tables[nodes[2].node_id][
services[2][1].service_id] = set(['table-A'])
# validate
def _validate_subbed_tables(node):
for s in node.get_services():
sid = s.service_id
subscribed_tables = node.service_object(
sid)._published_tables_with_subscriber
self.assertEqual(
subscribed_tables,
expected_subbed_tables[node.node_id][sid],
'%s has incorrect subscribed tables list' % sid)
return True
for n in nodes:
helper.retry_check_function_return_value(
lambda: _validate_subbed_tables(n), True)
# selectively unsubscribe
services[1][0].unsubscribe(services[2][0].service_id, 'table-A')
# note that services[2][1] still subscribes to 'table-B'
services[2][0].unsubscribe(services[1][0].service_id, 'table-B')
# extraneous unsubscribe
services[2][0].unsubscribe(services[1][0].service_id, 'table-None')
# update expected results
expected_subbed_tables[nodes[2].node_id][
services[2][0].service_id] = set(['table-C', 'table-D'])
for n in nodes:
helper.retry_check_function_return_value(
lambda: _validate_subbed_tables(n), True)
# resubscribe
services[1][0].subscribe(services[2][0].service_id, 'table-A')
services[2][0].subscribe(services[1][0].service_id, 'table-B')
# update expected results
expected_subbed_tables[nodes[2].node_id][
services[2][0].service_id] = set(['table-A', 'table-C', 'table-D'])
for n in nodes:
helper.retry_check_function_return_value(
lambda: _validate_subbed_tables(n), True)
def test_policy_table_publish(self):
"""Policy table result publish
Test basic DSE functionality with policy engine and table result
publish.
"""
node = helper.make_dsenode_new_partition('testnode')
data = fake_datasource.FakeDataSource('data')
policy = agnostic.Dse2Runtime('policy')
policy2 = agnostic.Dse2Runtime('policy2')
node.register_service(data)
node.register_service(policy)
node.register_service(policy2)
policy.create_policy('data')
policy.create_policy('classification')
policy.set_schema('data', compile.Schema({'q': (1,)}))
policy.insert('p(x):-data:q(x),gt(x,2)', target='classification')
policy.insert('q(3)', target='data')
# TODO(ekcs): test that no publish triggered (because no subscribers)
policy2.create_policy('policy')
policy2.subscribe('policy', 'classification:p')
helper.retry_check_function_return_value(
lambda: 'classification:p' in
policy._published_tables_with_subscriber, True)
self.assertEqual(list(policy.policySubData.keys()),
[('p', 'classification', None)])
helper.retry_check_db_equal(
policy2, 'policy:classification:p(x)',
'policy:classification:p(3)')
policy.insert('q(4)', target='data')
helper.retry_check_db_equal(
policy2, 'policy:classification:p(x)',
('policy:classification:p(3)'
' policy:classification:p(4)'))
# test that no change to p means no publish triggered
policy.insert('q(2)', target='data')
# TODO(ekcs): test no publish triggered
policy.delete('q(4)', target='data')
helper.retry_check_db_equal(
policy2, 'policy:classification:p(x)',
'policy:classification:p(3)')
policy2.unsubscribe('policy', 'classification:p')
# trigger removed
helper.retry_check_function_return_value(
lambda: len(policy._published_tables_with_subscriber) == 0, True)
self.assertEqual(list(policy.policySubData.keys()), [])
policy.insert('q(4)', target='data')
# TODO(ekcs): test that no publish triggered (because no subscribers)
def test_replicated_pe_exec(self):
"""Test correct local leader behavior with 2 PEs requesting exec"""
node1 = helper.make_dsenode_new_partition('testnode1')
node2 = helper.make_dsenode_same_partition(node1, 'testnode2')
dsd = fake_datasource.FakeDataSource('dsd')
# faster time-out for testing
dsd.LEADER_TIMEOUT = 2
pe1 = agnostic.Dse2Runtime('pe1')
pe2 = agnostic.Dse2Runtime('pe2')
node1.register_service(pe1)
node2.register_service(pe2)
node1.register_service(dsd)
assert dsd._running
assert node1._running
assert node2._running
assert node1._control_bus._running
# first exec request obeyed and leader set
pe2.rpc('dsd', 'request_execute',
{'action': 'fake_act', 'action_args': {'name': 'testnode2'}})
helper.retry_check_function_return_value(
lambda: len(dsd.exec_history), 1)
self.assertEqual(dsd._leader_node_id, 'testnode2')
# second exec request from leader obeyed and leader remains
pe2.rpc('dsd', 'request_execute',
{'action': 'fake_act', 'action_args': {'name': 'testnode2'}})
helper.retry_check_function_return_value(
lambda: len(dsd.exec_history), 2)
self.assertEqual(dsd._leader_node_id, 'testnode2')
# exec request from non-leader not obeyed
pe1.rpc('dsd', 'request_execute',
{'action': 'fake_act', 'action_args': {'name': 'testnode1'}})
self.assertRaises(
helper.TestFailureException,
helper.retry_check_function_return_value,
lambda: len(dsd.exec_history), 3)
# leader vacated after heartbeat stops
node2.stop()
node2.wait()
helper.retry_check_function_return_value(
lambda: dsd._leader_node_id, None)
# next exec request obeyed and new leader set
pe1.rpc('dsd', 'request_execute',
{'action': 'fake_act', 'action_args': {'name': 'testnode1'}})
helper.retry_check_function_return_value(
lambda: len(dsd.exec_history), 3)
self.assertEqual(dsd._leader_node_id, 'testnode1')