1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
|
#!/usr/bin/env python
# SPDX-License-Identifier: ISC
#
# test_bfd_topo1.py
# Part of NetDEF Topology Tests
#
# Copyright (c) 2018 by
# Network Device Education Foundation, Inc. ("NetDEF")
#
"""
test_bfd_topo1.py: Test the FRR BFD daemon.
"""
import os
import sys
import json
from functools import partial
import pytest
# Save the Current Working Directory to find configuration files.
CWD = os.path.dirname(os.path.realpath(__file__))
sys.path.append(os.path.join(CWD, "../"))
# pylint: disable=C0413
# Import topogen and topotest helpers
from lib import topotest
from lib.topogen import Topogen, TopoRouter, get_topogen
from lib.topolog import logger
pytestmark = [pytest.mark.bfdd, pytest.mark.bgpd]
def setup_module(mod):
"Sets up the pytest environment"
topodef = {
"s1": ("r1", "r2"),
"s2": ("r2", "r3"),
"s3": ("r2", "r4"),
}
tgen = Topogen(topodef, mod.__name__)
tgen.start_topology()
router_list = tgen.routers()
for rname, router in router_list.items():
router.load_config(
TopoRouter.RD_ZEBRA, os.path.join(CWD, "{}/zebra.conf".format(rname))
)
router.load_config(
TopoRouter.RD_BFD, os.path.join(CWD, "{}/bfdd.conf".format(rname))
)
router.load_config(
TopoRouter.RD_BGP, os.path.join(CWD, "{}/bgpd.conf".format(rname))
)
# Initialize all routers.
tgen.start_router()
# Verify that we are using the proper version and that the BFD
# daemon exists.
for router in router_list.values():
# Check for Version
if router.has_version("<", "5.1"):
tgen.set_error("Unsupported FRR version")
break
def teardown_module(_mod):
"Teardown the pytest environment"
tgen = get_topogen()
tgen.stop_topology()
def test_bfd_connection():
"Assert that the BFD peers can find themselves."
tgen = get_topogen()
if tgen.routers_have_failure():
pytest.skip(tgen.errors)
logger.info("waiting for bfd peers to go up")
for router in tgen.routers().values():
json_file = "{}/{}/peers.json".format(CWD, router.name)
expected = json.loads(open(json_file).read())
test_func = partial(
topotest.router_json_cmp, router, "show bfd peers json", expected
)
_, result = topotest.run_and_expect(test_func, None, count=30, wait=0.5)
assertmsg = '"{}" JSON output mismatches'.format(router.name)
assert result is None, assertmsg
def test_bgp_convergence():
"Assert that BGP is converging."
tgen = get_topogen()
if tgen.routers_have_failure():
pytest.skip(tgen.errors)
logger.info("waiting for bgp peers to go up")
for router in tgen.routers().values():
ref_file = "{}/{}/bgp_summary.json".format(CWD, router.name)
expected = json.loads(open(ref_file).read())
test_func = partial(
topotest.router_json_cmp, router, "show ip bgp summary json", expected
)
_, res = topotest.run_and_expect(test_func, None, count=125, wait=1.0)
assertmsg = "{}: bgp did not converge".format(router.name)
assert res is None, assertmsg
def test_bgp_fast_convergence():
"Assert that BGP is converging before setting a link down."
tgen = get_topogen()
if tgen.routers_have_failure():
pytest.skip(tgen.errors)
logger.info("waiting for bgp peers converge")
for router in tgen.routers().values():
ref_file = "{}/{}/bgp_prefixes.json".format(CWD, router.name)
expected = json.loads(open(ref_file).read())
test_func = partial(
topotest.router_json_cmp, router, "show ip bgp json", expected
)
_, res = topotest.run_and_expect(test_func, None, count=40, wait=0.5)
assertmsg = "{}: bgp did not converge".format(router.name)
assert res is None, assertmsg
def test_bfd_fast_convergence():
"""
Assert that BFD notices the link down after simulating network
failure.
"""
tgen = get_topogen()
if tgen.routers_have_failure():
pytest.skip(tgen.errors)
# Disable r1-eth0 link.
tgen.gears["r1"].link_enable("r1-eth0", enabled=False)
# Wait the minimum time we can before checking that BGP/BFD
# converged.
logger.info("waiting for BFD converge")
# Check that BGP converged quickly.
for router in tgen.routers().values():
json_file = "{}/{}/peers.json".format(CWD, router.name)
expected = json.loads(open(json_file).read())
# Load the same file as previous test, but expect R1 to be down.
if router.name == "r1":
for peer in expected:
if peer["peer"] == "192.168.0.2":
peer["status"] = "down"
else:
for peer in expected:
if peer["peer"] == "192.168.0.1":
peer["status"] = "down"
test_func = partial(
topotest.router_json_cmp, router, "show bfd peers json", expected
)
_, res = topotest.run_and_expect(test_func, None, count=20, wait=0.5)
assertmsg = '"{}" JSON output mismatches'.format(router.name)
assert res is None, assertmsg
def test_bgp_fast_reconvergence():
"Assert that BGP is converging after setting a link down."
tgen = get_topogen()
if tgen.routers_have_failure():
pytest.skip(tgen.errors)
logger.info("waiting for BGP re convergence")
# Check that BGP converged quickly.
for router in tgen.routers().values():
ref_file = "{}/{}/bgp_prefixes.json".format(CWD, router.name)
expected = json.loads(open(ref_file).read())
# Load the same file as previous test, but set networks to None
# to test absence.
if router.name == "r1":
expected["routes"]["10.254.254.2/32"] = None
expected["routes"]["10.254.254.3/32"] = None
expected["routes"]["10.254.254.4/32"] = None
else:
expected["routes"]["10.254.254.1/32"] = None
test_func = partial(
topotest.router_json_cmp, router, "show ip bgp json", expected
)
_, res = topotest.run_and_expect(test_func, None, count=5, wait=1)
assertmsg = "{}: bgp did not converge".format(router.name)
assert res is None, assertmsg
def test_memory_leak():
"Run the memory leak test and report results."
tgen = get_topogen()
if not tgen.is_memleak_enabled():
pytest.skip("Memory leak test/report is disabled")
tgen.report_memory_leaks()
if __name__ == "__main__":
args = ["-s"] + sys.argv[1:]
sys.exit(pytest.main(args))
|
