# Copyright (C) 2017 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 sys import time import unittest from fabric.api import local from fabric.state import env import nose from lib.noseplugin import OptionParser, parser_option from lib import base from lib.base import ( Bridge, BGP_FSM_ESTABLISHED, ) from lib.gobgp import GoBGPContainer from lib.quagga import QuaggaOSPFContainer def try_local(command, f=local, ok_ret_codes=None, **kwargs): ok_ret_codes = ok_ret_codes or [] orig_ok_ret_codes = list(env.ok_ret_codes) try: env.ok_ret_codes.extend(ok_ret_codes) return f(command, **kwargs) finally: env.ok_ret_codes = orig_ok_ret_codes def wait_for(f, timeout=120): interval = 1 count = 0 while True: if f(): return time.sleep(interval) count += interval if count >= timeout: raise Exception('timeout') def get_ifname_with_prefix(prefix, f=local): command = ( "ip addr show to %s" " | head -n1 | cut -d'@' -f1 | cut -d' ' -f2") % prefix return f(command, capture=True) class ZebraNHTTest(unittest.TestCase): """ Test case for Next-Hop Tracking with Zebra integration. """ # R1: GoBGP # R2: GoBGP + Zebra + OSPFd # R3: Zebra + OSPFd # R4: Zebra + OSPFd # # +----+ # | R3 |... has loopback 10.3.1.1/32 # +----+ # / | # / | # / +----+ # / | R4 | # / +----+ # +----+ | # | R2 |------+ # +----+ # | 192.168.0.2/24 # | # | 192.168.0.0/24 # | # | 192.168.0.1/24 # +----+ # | R1 | # +----+ @classmethod def setUpClass(cls): gobgp_ctn_image_name = parser_option.gobgp_image base.TEST_PREFIX = parser_option.test_prefix local("echo 'start %s'" % cls.__name__, capture=True) cls.r1 = GoBGPContainer( name='r1', asn=65000, router_id='192.168.0.1', ctn_image_name=gobgp_ctn_image_name, log_level=parser_option.gobgp_log_level, zebra=False) cls.r2 = GoBGPContainer( name='r2', asn=65000, router_id='192.168.0.2', ctn_image_name=gobgp_ctn_image_name, log_level=parser_option.gobgp_log_level, zebra=True, zapi_version=3, ospfd_config={ 'networks': { '192.168.23.0/24': '0.0.0.0', '192.168.24.0/24': '0.0.0.0', }, }) cls.r3 = QuaggaOSPFContainer( name='r3', zebra_config={ 'interfaces': { 'lo': [ 'ip address 10.3.1.1/32', ], }, }, ospfd_config={ 'networks': { '10.3.1.1/32': '0.0.0.0', '192.168.23.0/24': '0.0.0.0', '192.168.34.0/24': '0.0.0.0', }, }) cls.r4 = QuaggaOSPFContainer( name='r4', ospfd_config={ 'networks': { '192.168.34.0/24': '0.0.0.0', '192.168.24.0/24': '0.0.0.0', }, }) wait_time = max(ctn.run() for ctn in [cls.r1, cls.r2, cls.r3, cls.r4]) time.sleep(wait_time) cls.br_r1_r2 = Bridge(name='br_r1_r2', subnet='192.168.12.0/24') [cls.br_r1_r2.addif(ctn) for ctn in (cls.r1, cls.r2)] cls.br_r2_r3 = Bridge(name='br_r2_r3', subnet='192.168.23.0/24') [cls.br_r2_r3.addif(ctn) for ctn in (cls.r2, cls.r3)] cls.br_r2_r4 = Bridge(name='br_r2_r4', subnet='192.168.24.0/24') [cls.br_r2_r4.addif(ctn) for ctn in (cls.r2, cls.r4)] cls.br_r3_r4 = Bridge(name='br_r3_r4', subnet='192.168.34.0/24') [cls.br_r3_r4.addif(ctn) for ctn in (cls.r3, cls.r4)] def test_01_BGP_neighbor_established(self): """ Test to start BGP connection up between r1-r2. """ self.r1.add_peer(self.r2, bridge=self.br_r1_r2.name) self.r2.add_peer(self.r1, bridge=self.br_r1_r2.name) self.r1.wait_for(expected_state=BGP_FSM_ESTABLISHED, peer=self.r2) def test_02_OSPF_established(self): """ Test to start OSPF connection up between r2-r3 and receive the route to r3's loopback '10.3.1.1'. """ def _f(): return try_local( "vtysh -c 'show ip ospf route'" " | grep '10.3.1.1/32'", f=self.r2.local, ok_ret_codes=[1], # for the empty case with "grep" command capture=True) wait_for(f=_f) def test_03_add_ipv4_route(self): """ Test to add IPv4 route to '10.3.1.0/24' whose nexthop is r3's loopback '10.3.1.1'. Also, test to receive the initial MED/Metric. """ # MED/Metric = 10(r2 to r3) + 10(r3-ethX to r3-lo) med = 20 def _f_r2(): return try_local( "gobgp global rib -a ipv4 10.3.1.0/24" " | grep 'Med: %d'" % med, f=self.r2.local, ok_ret_codes=[1], # for the empty case with "grep" command capture=True) def _f_r1(): return try_local( "gobgp global rib -a ipv4 10.3.1.0/24" " | grep 'Med: %d'" % med, f=self.r1.local, ok_ret_codes=[1], # for the empty case with "grep" command capture=True) self.r2.local( 'gobgp global rib add -a ipv4 10.3.1.0/24 nexthop 10.3.1.1') wait_for(f=_f_r2) wait_for(f=_f_r1) def test_04_link_r2_r3_down(self): """ Test to update MED to the nexthop if the Metric to that nexthop is changed by the link down. If the link r2-r3 goes down, MED/Metric should be increased. """ # MED/Metric = 10(r2 to r4) + 10(r4 to r3) + 10(r3-ethX to r3-lo) med = 30 def _f_r2(): return try_local( "gobgp global rib -a ipv4 10.3.1.0/24" " | grep 'Med: %d'" % med, f=self.r2.local, ok_ret_codes=[1], # for the empty case with "grep" command capture=True) def _f_r1(): return try_local( "gobgp global rib -a ipv4 10.3.1.0/24" " | grep 'Med: %d'" % med, f=self.r1.local, ok_ret_codes=[1], # for the empty case with "grep" command capture=True) ifname = get_ifname_with_prefix('192.168.23.3/24', f=self.r3.local) self.r3.local('ip link set %s down' % ifname) wait_for(f=_f_r2) wait_for(f=_f_r1) def test_05_link_r2_r3_restore(self): """ Test to update MED to the nexthop if the Metric to that nexthop is changed by the link up again. If the link r2-r3 goes up again, MED/Metric should be update with the initial value. """ # MED/Metric = 10(r2 to r3) + 10(r3-ethX to r3-lo) med = 20 def _f_r2(): return try_local( "gobgp global rib -a ipv4 10.3.1.0/24" " | grep 'Med: %d'" % med, f=self.r2.local, ok_ret_codes=[1], # for the empty case with "grep" command capture=True) def _f_r1(): return try_local( "gobgp global rib -a ipv4 10.3.1.0/24" " | grep 'Med: %d'" % med, f=self.r1.local, ok_ret_codes=[1], # for the empty case with "grep" command capture=True) ifname = get_ifname_with_prefix('192.168.23.3/24', f=self.r3.local) self.r3.local('ip link set %s up' % ifname) wait_for(f=_f_r2) wait_for(f=_f_r1) if __name__ == '__main__': 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])