*: support long lived graceful restart

Signed-off-by: Wataru Ishida <ishida.wataru@lab.ntt.co.jp>

1 files changed, 170 insertions, 0 deletions

diff --git a/test/scenario_test/long_lived_graceful_restart_test.py b/test/scenario_test/long_lived_graceful_restart_test.py
new file mode 100644
index 00000000..e0c51586
--- /dev/null
+++ b/test/scenario_test/long_lived_graceful_restart_test.py
@@ -0,0 +1,170 @@
+# Copyright (C) 2016 Nippon Telegraph and Telephone Corporation.
+#
+# 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 unittest
+from fabric.api import local
+from lib import base
+from lib.gobgp import *
+from lib.quagga import *
+import sys
+import os
+import time
+import nose
+from noseplugin import OptionParser, parser_option
+from itertools import chain
+
+
+class GoBGPTestBase(unittest.TestCase):
+
+    @classmethod
+    def setUpClass(cls):
+        gobgp_ctn_image_name = parser_option.gobgp_image
+        base.TEST_PREFIX = parser_option.test_prefix
+
+        g1 = GoBGPContainer(name='g1', asn=65000, router_id='192.168.0.1',
+                            ctn_image_name=gobgp_ctn_image_name,
+                            log_level=parser_option.gobgp_log_level)
+        g2 = GoBGPContainer(name='g2', asn=65001, router_id='192.168.0.2',
+                            ctn_image_name=gobgp_ctn_image_name,
+                            log_level=parser_option.gobgp_log_level)
+        g3 = GoBGPContainer(name='g3', asn=65002, router_id='192.168.0.3',
+                            ctn_image_name=gobgp_ctn_image_name,
+                            log_level=parser_option.gobgp_log_level)
+        g4 = GoBGPContainer(name='g4', asn=65003, router_id='192.168.0.4',
+                            ctn_image_name=gobgp_ctn_image_name,
+                            log_level=parser_option.gobgp_log_level)
+        ctns = [g1, g2, g3, g4]
+
+        initial_wait_time = max(ctn.run() for ctn in ctns)
+
+        time.sleep(initial_wait_time)
+
+        g1.add_peer(g2, graceful_restart=True, llgr=True)
+        g2.add_peer(g1, graceful_restart=True, llgr=True)
+        g1.add_peer(g3, graceful_restart=True, llgr=True)
+        g3.add_peer(g1, graceful_restart=True, llgr=True)
+        g1.add_peer(g4, graceful_restart=True)
+        g4.add_peer(g1, graceful_restart=True)
+
+        cls.bgpds = {'g1': g1, 'g2': g2, 'g3': g3, 'g4': g4}
+
+    # test each neighbor state is turned establish
+    def test_01_neighbor_established(self):
+        g1 = self.bgpds['g1']
+        g2 = self.bgpds['g2']
+        g3 = self.bgpds['g3']
+        g4 = self.bgpds['g4']
+        g1.wait_for(expected_state=BGP_FSM_ESTABLISHED, peer=g2)
+        g1.wait_for(expected_state=BGP_FSM_ESTABLISHED, peer=g3)
+        g1.wait_for(expected_state=BGP_FSM_ESTABLISHED, peer=g4)
+
+    def test_02_graceful_restart(self):
+        g1 = self.bgpds['g1']
+        g2 = self.bgpds['g2']
+        g3 = self.bgpds['g3']
+        g4 = self.bgpds['g4']
+
+        g2.local('gobgp global rib add 10.0.0.0/24')
+        g2.local('gobgp global rib add 10.10.0.0/24 community no-llgr')
+
+        time.sleep(1)
+
+        g2.graceful_restart()
+        g1.wait_for(expected_state=BGP_FSM_ACTIVE, peer=g2)
+
+        time.sleep(1)
+
+        self.assertTrue(len(g1.get_global_rib('10.0.0.0/24')) == 1)
+        # 10.10.0.0/24 is announced with no-llgr community
+        # must not exist in the rib
+        self.assertTrue(len(g1.get_global_rib('10.10.0.0/24')) == 0)
+        for d in g1.get_global_rib():
+            for p in d['paths']:
+                self.assertTrue(p['stale'])
+
+        self.assertTrue(len(g3.get_global_rib('10.0.0.0/24')) == 1)
+        # check llgr-stale community is added to 10.0.0.0/24
+        r = g3.get_global_rib('10.0.0.0/24')[0]['paths'][0]
+        comms = list(chain.from_iterable([ attr['communities'] for attr in r['attrs'] if attr['type'] == 8]))
+        self.assertTrue(0xffff0006 in comms)
+        # g4 is not llgr capable, llgr-stale route must be
+        # withdrawn
+        self.assertTrue(len(g4.get_global_rib('10.0.0.0/24')) == 0)
+
+        g2._start_gobgp(graceful_restart=True)
+        time.sleep(2)
+        g2.local('gobgp global rib add 10.0.0.0/24')
+        g2.local('gobgp global rib add 10.10.0.0/24')
+
+    def test_03_neighbor_established(self):
+        g1 = self.bgpds['g1']
+        g2 = self.bgpds['g2']
+        g3 = self.bgpds['g3']
+        g4 = self.bgpds['g4']
+        g1.wait_for(expected_state=BGP_FSM_ESTABLISHED, peer=g2)
+        time.sleep(1)
+        self.assertTrue(len(g1.get_global_rib('10.0.0.0/24')) == 1)
+        self.assertTrue(len(g1.get_global_rib('10.10.0.0/24')) == 1)
+        for d in g1.get_global_rib():
+            for p in d['paths']:
+                self.assertFalse(p.get('stale', False))
+
+    def test_04_llgr_stale_route_depreferenced(self):
+        g1 = self.bgpds['g1']
+        g2 = self.bgpds['g2']
+        g3 = self.bgpds['g3']
+        g4 = self.bgpds['g4']
+        g4.local('gobgp global rib add 10.0.0.0/24 med 100')
+        time.sleep(1)
+        # check g2's path is chosen as best and advertised
+        rib = g3.get_global_rib('10.0.0.0/24')
+        self.assertTrue(len(rib) == 1)
+        self.assertTrue(g2.asn in rib[0]['paths'][0]['aspath'])
+
+        g2.graceful_restart()
+        g1.wait_for(expected_state=BGP_FSM_ACTIVE, peer=g2)
+
+        time.sleep(1)
+        
+        # llgr_stale route depreference must happend
+        # check g4's path is chosen as best and advertised
+        rib = g3.get_global_rib('10.0.0.0/24')
+        self.assertTrue(len(rib) == 1)
+        self.assertTrue(g4.asn in rib[0]['paths'][0]['aspath'])
+
+        # if no candidate exists, llgr_stale route will be chosen as best
+        rib = g3.get_global_rib('10.10.0.0/24')
+        self.assertTrue(len(rib) == 1)
+        self.assertTrue(g2.asn in rib[0]['paths'][0]['aspath'])
+
+
+    def test_05_llgr_restart_timer_expire(self):
+        time.sleep(35)
+        g3 = self.bgpds['g3']
+        rib = g3.get_global_rib('10.10.0.0/24')
+        self.assertTrue(len(rib) == 0)
+
+
+if __name__ == '__main__':
+    if os.geteuid() is not 0:
+        print "you are not root."
+        sys.exit(1)
+    output = local("which docker 2>&1 > /dev/null ; echo $?", capture=True)
+    if int(output) is not 0:
+        print "docker not found"
+        sys.exit(1)
+
+    nose.main(argv=sys.argv, addplugins=[OptionParser()],
+              defaultTest=sys.argv[0])