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# 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
import nose
from lib.noseplugin import OptionParser, parser_option
from lib import base
from lib.base import (
assert_several_times,
Bridge,
BGP_FSM_ESTABLISHED,
local,
)
from lib.gobgp import GoBGPContainer
from lib.quagga import QuaggaOSPFContainer
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.
"""
def _assert_med_equal(self, rt, prefix, med):
rib = rt.get_global_rib(prefix=prefix)
self.assertEqual(len(rib), 1)
self.assertEqual(len(rib[0]['paths']), 1)
self.assertEqual(rib[0]['paths'][0]['med'], med)
# 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
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')
for ctn in (cls.r1, cls.r2):
cls.br_r1_r2.addif(ctn)
cls.br_r2_r3 = Bridge(name='br_r2_r3', subnet='192.168.23.0/24')
for ctn in (cls.r2, cls.r3):
cls.br_r2_r3.addif(ctn)
cls.br_r2_r4 = Bridge(name='br_r2_r4', subnet='192.168.24.0/24')
for ctn in (cls.r2, cls.r4):
cls.br_r2_r4.addif(ctn)
cls.br_r3_r4 = Bridge(name='br_r3_r4', subnet='192.168.34.0/24')
for ctn in (cls.r3, cls.r4):
cls.br_r3_r4.addif(ctn)
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():
self.assertEqual(self.r2.local(
"vtysh -c 'show ip ospf route'"
" | grep '10.3.1.1/32' > /dev/null"
" && echo OK || echo NG",
capture=True), 'OK')
assert_several_times(f=_f, t=120)
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
self.r2.local(
'gobgp global rib add -a ipv4 10.3.1.0/24 nexthop 10.3.1.1')
assert_several_times(
f=lambda: self._assert_med_equal(self.r2, '10.3.1.0/24', med))
assert_several_times(
f=lambda: self._assert_med_equal(self.r1, '10.3.1.0/24', med))
# Test if the path, which came after the NEXTHOP_UPDATE message was
# received from Zebra, is updated by reflecting the nexthop cache.
self.r2.local(
'gobgp global rib add -a ipv4 10.3.2.0/24 nexthop 10.3.1.1')
assert_several_times(
f=lambda: self._assert_med_equal(self.r2, '10.3.2.0/24', med))
assert_several_times(
f=lambda: self._assert_med_equal(self.r1, '10.3.2.0/24', med))
self.r2.local(
'gobgp global rib del -a ipv4 10.3.2.0/24')
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
ifname = get_ifname_with_prefix('192.168.23.3/24', f=self.r3.local)
self.r3.local('ip link set %s down' % ifname)
assert_several_times(
f=lambda: self._assert_med_equal(self.r2, '10.3.1.0/24', med))
assert_several_times(
f=lambda: self._assert_med_equal(self.r1, '10.3.1.0/24', med))
def test_05_nexthop_unreachable(self):
# Test to update the nexthop state if nexthop become unreachable by
# link down. If the link r2-r3 and r2-r4 goes down, there is no route
# to r3.
def _f_r2(prefix):
self.assertEqual(self.r2.local(
"gobgp global rib -a ipv4 %s"
" | grep '^* ' > /dev/null" # not best "*>"
" && echo OK || echo NG" % prefix,
capture=True), 'OK')
def _f_r1(prefix):
self.assertEqual(self.r1.local(
"gobgp global rib -a ipv4 %s"
"| grep 'Network not in table' > /dev/null"
" && echo OK || echo NG" % prefix,
capture=True), 'OK')
ifname = get_ifname_with_prefix('192.168.24.4/24', f=self.r4.local)
self.r4.local('ip link set %s down' % ifname)
assert_several_times(f=lambda: _f_r2("10.3.1.0/24"), t=120)
assert_several_times(f=lambda: _f_r1("10.3.1.0/24"), t=120)
# Test if the path, which came after the NEXTHOP_UPDATE message was
# received from Zebra, is updated by reflecting the nexthop cache.
self.r2.local(
'gobgp global rib add -a ipv4 10.3.2.0/24 nexthop 10.3.1.1')
assert_several_times(f=lambda: _f_r2("10.3.2.0/24"), t=120)
assert_several_times(f=lambda: _f_r1("10.3.2.0/24"), t=120)
# Confirm the stability of the nexthop state
for _ in range(10):
time.sleep(1)
_f_r2("10.3.1.0/24")
_f_r1("10.3.1.0/24")
_f_r2("10.3.2.0/24")
_f_r1("10.3.2.0/24")
def test_06_link_r2_r4_restore(self):
# Test to update the nexthop state if nexthop become reachable again.
# If the link r2-r4 goes up again, MED/Metric should be the value of
# the path going through r4.
# MED/Metric = 10(r2 to r4) + 10(r4 to r3) + 10(r3-ethX to r3-lo)
med = 30
ifname = get_ifname_with_prefix('192.168.24.4/24', f=self.r4.local)
self.r4.local('ip link set %s up' % ifname)
assert_several_times(
f=lambda: self._assert_med_equal(self.r2, '10.3.1.0/24', med))
assert_several_times(
f=lambda: self._assert_med_equal(self.r1, '10.3.1.0/24', med))
def test_07_nexthop_restore(self):
# Test to update the nexthop state if the Metric to that nexthop is
# changed. 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
ifname = get_ifname_with_prefix('192.168.23.3/24', f=self.r3.local)
self.r3.local('ip link set %s up' % ifname)
assert_several_times(
f=lambda: self._assert_med_equal(self.r2, '10.3.1.0/24', med))
assert_several_times(
f=lambda: self._assert_med_equal(self.r1, '10.3.1.0/24', med))
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])
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