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|
#!/usr/bin/env python
# SPDX-License-Identifier: ISC
#
# test_ospf_metric_propagation.py
#
# Copyright (c) 2023 ATCorp
# Jafar Al-Gharaibeh
#
import os
import sys
import json
from functools import partial
import pytest
# pylint: disable=C0413
# Import topogen and topotest helpers
from lib import topotest
from lib.topogen import Topogen, get_topogen
from lib.topolog import logger
"""
test_ospf_metric_propagation.py: Test OSPF/BGP metric propagation
"""
TOPOLOGY = """
+-----+ +-----+
eth1 | | eth0 | | eth2
+-------------+ rA +---------------------------+ rB +---------------+
| .5 | | .5 .6 | | .6 |
| +--+--+ 10.0.50.0/24 +--+--+ .6 |
| |.5 |.6 |
| eth2| eth1| |
10.0.10.0/24 | | |
| 10.0.20.0/24 10.0.30.0/24 10.0.40.0/24
|blue |blue |blue |blue
| | | |
eth1|.1 eth1|.2 eth1|.3 eth1|.4
+-----+ +--+--+ +--+--+ +-----+ +-+---+ +-+---+ +------+
| |eth0 eth2| | eth0 | |eth2 eth1| |eth2 eth3| | eth0 | |eth2 eth0| |
| h1 +----------+ R1 +----------+ R2 +-----------+ rC +----------+ R3 +------------+ R4 +---------+ h2 |
| | | | | | | | | | | | | |
+-----+.2 .1 +-----+.1 .2+-----+.2 .7 +-----+.7 .3+-----+.3 .4+-----+.4 .2+------+
green green green green
10.0.91.0/24 10.0.1.0/24 10.0.70.0/24 10.0.80.0/24 10.0.3.0/24 10.0.94.0/24
"""
# Save the Current Working Directory to find configuration files.
CWD = os.path.dirname(os.path.realpath(__file__))
sys.path.append(os.path.join(CWD, "../"))
# Required to instantiate the topology builder class.
pytestmark = [pytest.mark.ospfd, pytest.mark.bgpd]
def build_topo(tgen):
"Build function"
# Create 4 routers
for routern in range(1, 5):
tgen.add_router("r{}".format(routern))
tgen.add_router("ra")
tgen.add_router("rb")
tgen.add_router("rc")
tgen.add_router("h1")
tgen.add_router("h2")
# Interconect router 1, 2
switch = tgen.add_switch("s1-2")
switch.add_link(tgen.gears["r1"])
switch.add_link(tgen.gears["r2"])
# Interconect router 3, 4
switch = tgen.add_switch("s3-4")
switch.add_link(tgen.gears["r3"])
switch.add_link(tgen.gears["r4"])
# Interconect router a, b
switch = tgen.add_switch("sa-b")
switch.add_link(tgen.gears["ra"])
switch.add_link(tgen.gears["rb"])
# Interconect router 1, a
switch = tgen.add_switch("s1-a")
switch.add_link(tgen.gears["r1"])
switch.add_link(tgen.gears["ra"])
# Interconect router 2, a
switch = tgen.add_switch("s2-a")
switch.add_link(tgen.gears["r2"])
switch.add_link(tgen.gears["ra"])
# Interconect router 3, b
switch = tgen.add_switch("s3-b")
switch.add_link(tgen.gears["r3"])
switch.add_link(tgen.gears["rb"])
# Interconect router 4, b
switch = tgen.add_switch("s4-b")
switch.add_link(tgen.gears["r4"])
switch.add_link(tgen.gears["rb"])
# Interconect router 1, h1
switch = tgen.add_switch("s1-h1")
switch.add_link(tgen.gears["r1"])
switch.add_link(tgen.gears["h1"])
# Interconect router 4, h2
switch = tgen.add_switch("s4-h2")
switch.add_link(tgen.gears["r4"])
switch.add_link(tgen.gears["h2"])
# Interconect router 2, c
switch = tgen.add_switch("s2-c")
switch.add_link(tgen.gears["r2"])
switch.add_link(tgen.gears["rc"])
# Interconect router 3, c
switch = tgen.add_switch("s3-c")
switch.add_link(tgen.gears["r3"])
switch.add_link(tgen.gears["rc"])
def setup_module(mod):
logger.info("OSPF Metric Propagation:\n {}".format(TOPOLOGY))
tgen = Topogen(build_topo, mod.__name__)
tgen.start_topology()
vrf_setup_cmds = [
"ip link add name blue type vrf table 11",
"ip link set dev blue up",
"ip link add name green type vrf table 12",
"ip link set dev green up",
]
# Starting Routers
router_list = tgen.routers()
# Create VRFs and bind to interfaces
for routern in range(1, 5):
for cmd in vrf_setup_cmds:
tgen.net["r{}".format(routern)].cmd(cmd)
for routern in range(1, 5):
tgen.net["r{}".format(routern)].cmd(
"ip link set dev r{}-eth1 vrf blue up".format(routern)
)
tgen.net["r{}".format(routern)].cmd(
"ip link set dev r{}-eth2 vrf green up".format(routern)
)
for rname, router in router_list.items():
logger.info("Loading router %s" % rname)
router.load_frr_config(os.path.join(CWD, "{}/frr.conf".format(rname)))
# Initialize all routers.
tgen.start_router()
for router in router_list.values():
if router.has_version("<", "4.20"):
tgen.set_error("unsupported version")
def teardown_module():
"Teardown the pytest environment"
tgen = get_topogen()
tgen.stop_topology()
def test_all_links_up():
"Test path R1 -> Ra -> Rb -> R4"
tgen = get_topogen()
if tgen.routers_have_failure():
pytest.skip("skipped because of router(s) failure")
r1 = tgen.gears["r1"]
json_file = "{}/r1/show_ip_route-1.json".format(CWD)
expected = json.loads(open(json_file).read())
test_func = partial(
topotest.router_json_cmp, r1, "show ip route vrf green 10.0.94.2 json", expected
)
_, result = topotest.run_and_expect(test_func, None, count=60, wait=1)
assertmsg = "r1 JSON output mismatches"
assert result is None, assertmsg
def test_link_1_down():
"Test path R1 -> R2 -> Ra -> Rb -> R4"
tgen = get_topogen()
if tgen.routers_have_failure():
pytest.skip("skipped because of router(s) failure")
tgen.net["r1"].cmd("ip link set dev r1-eth1 down")
r1 = tgen.gears["r1"]
json_file = "{}/r1/show_ip_route-2.json".format(CWD)
expected = json.loads(open(json_file).read())
test_func = partial(
topotest.router_json_cmp, r1, "show ip route vrf green 10.0.94.2 json", expected
)
_, result = topotest.run_and_expect(test_func, None, count=60, wait=1)
assertmsg = "r1 JSON output mismatches"
assert result is None, assertmsg
def test_link_1_2_down():
"Test path R1 -> R2 -> Rc -> R3 -> Rb -> R4"
tgen = get_topogen()
if tgen.routers_have_failure():
pytest.skip("skipped because of router(s) failure")
tgen.net["r2"].cmd("ip link set dev r2-eth1 down")
tgen.net["r1"].cmd("ip link set dev r1-eth0 down")
tgen.net["r2"].cmd("ip link set dev r2-eth2 down")
tgen.net["r2"].cmd("ip link set dev r2-eth2 up")
tgen.net["r1"].cmd("ip link set dev r1-eth0 up")
r1 = tgen.gears["r1"]
json_file = "{}/r1/show_ip_route-3.json".format(CWD)
expected = json.loads(open(json_file).read())
test_func = partial(
topotest.router_json_cmp, r1, "show ip route vrf green 10.0.94.2 json", expected
)
_, result = topotest.run_and_expect(test_func, None, count=60, wait=1)
assertmsg = "r1 JSON output mismatches"
assert result is None, assertmsg
def test_link_1_2_3_down():
"Test path R1 -> R2 -> Rc -> R3 -> R4"
tgen = get_topogen()
if tgen.routers_have_failure():
pytest.skip("skipped because of router(s) failure")
tgen.net["r3"].cmd("ip link set dev r3-eth1 down")
tgen.net["r1"].cmd("ip link set dev r1-eth0 down")
tgen.net["r3"].cmd("ip link set dev r3-eth0 down")
tgen.net["r3"].cmd("ip link set dev r3-eth0 up")
tgen.net["r1"].cmd("ip link set dev r1-eth0 up")
r1 = tgen.gears["r1"]
json_file = "{}/r1/show_ip_route-4.json".format(CWD)
expected = json.loads(open(json_file).read())
test_func = partial(
topotest.router_json_cmp, r1, "show ip route vrf green 10.0.94.2 json", expected
)
_, result = topotest.run_and_expect(test_func, None, count=60, wait=1)
assertmsg = "r1 JSON output mismatches"
assert result is None, assertmsg
def test_link_1_2_3_4_down():
"Test path R1 -> R2 -> Rc -> R3 -> R4"
tgen = get_topogen()
if tgen.routers_have_failure():
pytest.skip("skipped because of router(s) failure")
tgen.net["r4"].cmd("ip link set dev r4-eth1 down")
r1 = tgen.gears["r1"]
json_file = "{}/r1/show_ip_route-4.json".format(CWD)
expected = json.loads(open(json_file).read())
test_func = partial(
topotest.router_json_cmp, r1, "show ip route vrf green 10.0.94.2 json", expected
)
_, result = topotest.run_and_expect(test_func, None, count=60, wait=1)
assertmsg = "r1 JSON output mismatches"
assert result is None, assertmsg
def test_link_1_2_4_down_3_up():
"Test path R1 -> R2 -> Rc -> R3 -> R4"
tgen = get_topogen()
if tgen.routers_have_failure():
pytest.skip("skipped because of router(s) failure")
# bring link 3 back up
tgen.net["r3"].cmd("ip link set dev r3-eth1 up")
r1 = tgen.gears["r1"]
json_file = "{}/r1/show_ip_route-4.json".format(CWD)
expected = json.loads(open(json_file).read())
test_func = partial(
topotest.router_json_cmp, r1, "show ip route vrf green 10.0.94.2 json", expected
)
_, result = topotest.run_and_expect(test_func, None, count=60, wait=1)
assertmsg = "r1 JSON output mismatches"
assert result is None, assertmsg
def test_link_1_4_down_2_up():
"Test path R1 -> R2 -> Ra -> Rb -> R3 -> R4"
tgen = get_topogen()
if tgen.routers_have_failure():
pytest.skip("skipped because of router(s) failure")
# bring back link 2 up
tgen.net["r2"].cmd("ip link set dev r2-eth1 up")
r1 = tgen.gears["r1"]
json_file = "{}/r1/show_ip_route-5.json".format(CWD)
expected = json.loads(open(json_file).read())
test_func = partial(
topotest.router_json_cmp, r1, "show ip route vrf green 10.0.94.2 json", expected
)
_, result = topotest.run_and_expect(test_func, None, count=120, wait=2)
assertmsg = "r1 JSON output mismatches"
assert result is None, assertmsg
def test_link_4_down_1_up():
"Test path R1 -> Ra -> Rb -> R3 -> R4"
tgen = get_topogen()
if tgen.routers_have_failure():
pytest.skip("skipped because of router(s) failure")
# bring back link 1 up
tgen.net["r1"].cmd("ip link set dev r1-eth1 up")
r1 = tgen.gears["r1"]
json_file = "{}/r1/show_ip_route-6.json".format(CWD)
expected = json.loads(open(json_file).read())
test_func = partial(
topotest.router_json_cmp, r1, "show ip route vrf green 10.0.94.2 json", expected
)
_, result = topotest.run_and_expect(test_func, None, count=120, wait=2)
assertmsg = "r1 JSON output mismatches"
assert result is None, assertmsg
def test_link_1_2_3_4_up():
"Test path R1 -> Ra -> Rb -> R4"
tgen = get_topogen()
if tgen.routers_have_failure():
pytest.skip("skipped because of router(s) failure")
# bring back link 4 up
tgen.net["r4"].cmd("ip link set dev r4-eth1 up")
r1 = tgen.gears["r1"]
json_file = "{}/r1/show_ip_route-1.json".format(CWD)
expected = json.loads(open(json_file).read())
test_func = partial(
topotest.router_json_cmp, r1, "show ip route vrf green 10.0.94.2 json", expected
)
_, result = topotest.run_and_expect(test_func, None, count=120, wait=2)
assertmsg = "r1 JSON output mismatches"
assert result 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))
|
