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#!/usr/bin/env python
#
# test_bfd_ospf_topo1.py
# Part of NetDEF Topology Tests
#
# Copyright (c) 2020 by
# Network Device Education Foundation, Inc. ("NetDEF")
#
# Permission to use, copy, modify, and/or distribute this software
# for any purpose with or without fee is hereby granted, provided
# that the above copyright notice and this permission notice appear
# in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND NETDEF DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NETDEF BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY
# DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
# WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
# ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
# OF THIS SOFTWARE.
#
"""
test_bfd_ospf_topo1.py:
+---------+
| |
eth-rt2 (.1) | RT1 | eth-rt3 (.1)
+----------+ 1.1.1.1 +----------+
| | | |
| +---------+ |
| |
| 10.0.2.0/24 |
| |
| eth-rt1 | (.2)
| 10.0.1.0/24 +----+----+
| | |
| | RT3 |
| | 3.3.3.3 |
| | |
(.2) | eth-rt1 +----+----+
+----+----+ eth-rt4 | (.1)
| | |
| RT2 | |
| 2.2.2.2 | 10.0.4.0/24 |
| | |
+----+----+ |
(.1) | eth-rt5 eth-rt3 | (.2)
| +----+----+
| | |
| | RT4 |
| | 4.4.4.4 |
| | |
| +----+----+
| 10.0.3.0/24 eth-rt5 | (.1)
| |
| |
| 10.0.5.0/24 |
| |
| +---------+ |
| | | |
+----------+ RT5 +----------+
eth-rt2 (.2) | 5.5.5.5 | eth-rt4 (.2)
| |
+---------+
"""
import os
import sys
import pytest
import json
from time import sleep
from functools import partial
# 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.ospfd]
def setup_module(mod):
"Sets up the pytest environment"
topodef = {
"s1": ("rt1:eth-rt2", "rt2:eth-rt1"),
"s2": ("rt1:eth-rt3", "rt3:eth-rt1"),
"s3": ("rt2:eth-rt5", "rt5:eth-rt2"),
"s4": ("rt3:eth-rt4", "rt4:eth-rt3"),
"s5": ("rt4:eth-rt5", "rt5:eth-rt4"),
}
tgen = Topogen(topodef, mod.__name__)
tgen.start_topology()
router_list = tgen.routers()
# For all registered routers, load the zebra configuration file
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_OSPF, os.path.join(CWD, "{}/ospfd.conf".format(rname))
)
router.load_config(
TopoRouter.RD_OSPF6, os.path.join(CWD, "{}/ospf6d.conf".format(rname))
)
tgen.start_router()
def teardown_module(mod):
"Teardown the pytest environment"
tgen = get_topogen()
# This function tears down the whole topology.
tgen.stop_topology()
def print_cmd_result(rname, command):
print(get_topogen().gears[rname].vtysh_cmd(command, isjson=False))
def router_compare_json_output(rname, command, reference, count=40, wait=2):
"Compare router JSON output"
logger.info('Comparing router "%s" "%s" output', rname, command)
tgen = get_topogen()
filename = "{}/{}/{}".format(CWD, rname, reference)
expected = json.loads(open(filename).read())
# Run test function until we get an result. Wait at most 80 seconds.
test_func = partial(topotest.router_json_cmp, tgen.gears[rname], command, expected)
_, diff = topotest.run_and_expect(test_func, None, count=count, wait=wait)
assertmsg = '"{}" JSON output mismatches the expected result'.format(rname)
assert diff is None, assertmsg
## TEST STEPS
def test_rib_ospf_step1():
logger.info("Test (step 1): verify RIB for OSPF")
tgen = get_topogen()
# Skip if previous fatal error condition is raised
if tgen.routers_have_failure():
pytest.skip(tgen.errors)
router_compare_json_output(
"rt1", "show ip route ospf json", "step1/show_ip_route.ref"
)
router_compare_json_output(
"rt1", "show ipv6 route ospf json", "step1/show_ipv6_route.ref"
)
def test_bfd_ospf_sessions_step2():
logger.info("Test (step 2): verify BFD peers for OSPF")
tgen = get_topogen()
# Skip if previous fatal error condition is raised
if tgen.routers_have_failure():
pytest.skip(tgen.errors)
# BFD is just used on three routers
for rt in ["rt1", "rt2", "rt3"]:
router_compare_json_output(
rt, "show bfd peers json", "step2/show_bfd_peers.ref"
)
def test_bfd_ospf_interface_failure_rt2_step3():
logger.info("Test (step 3): Check failover handling with RT2 down")
tgen = get_topogen()
# Skip if previous fatal error condition is raised
if tgen.routers_have_failure():
pytest.skip(tgen.errors)
# Let's kill the interface on rt2 and see what happens with the RIB and BFD on rt1
tgen.gears["rt2"].link_enable("eth-rt1", enabled=False)
# By default BFD provides a recovery time of 900ms plus jitter, so let's wait
# initial 2 seconds to let the CI not suffer.
topotest.sleep(2, "Wait for BFD down notification")
router_compare_json_output(
"rt1", "show ip route ospf json", "step3/show_ip_route_rt2_down.ref", 10, 2
)
router_compare_json_output(
"rt1", "show ipv6 route ospf json", "step3/show_ipv6_route_rt2_down.ref", 10, 2
)
router_compare_json_output(
"rt1", "show bfd peers json", "step3/show_bfd_peers_rt2_down.ref", 10, 2
)
# Check recovery, this can take some time
tgen.gears["rt2"].link_enable("eth-rt1", enabled=True)
router_compare_json_output(
"rt1", "show ip route ospf json", "step3/show_ip_route_healthy.ref"
)
router_compare_json_output(
"rt1", "show ipv6 route ospf json", "step3/show_ipv6_route_healthy.ref"
)
router_compare_json_output(
"rt1", "show bfd peers json", "step3/show_bfd_peers_healthy.ref"
)
def test_bfd_ospf_interface_failure_rt3_step3():
logger.info("Test (step 3): Check failover handling with RT3 down")
tgen = get_topogen()
# Skip if previous fatal error condition is raised
if tgen.routers_have_failure():
pytest.skip(tgen.errors)
# Let's kill the interface on rt3 and see what happens with the RIB and BFD on rt1
tgen.gears["rt3"].link_enable("eth-rt1", enabled=False)
# By default BFD provides a recovery time of 900ms plus jitter, so let's wait
# initial 2 seconds to let the CI not suffer.
topotest.sleep(2, "Wait for BFD down notification")
router_compare_json_output(
"rt1", "show ip route ospf json", "step3/show_ip_route_rt3_down.ref", 10, 2
)
router_compare_json_output(
"rt1", "show ipv6 route ospf json", "step3/show_ipv6_route_rt3_down.ref", 10, 2
)
router_compare_json_output(
"rt1", "show bfd peers json", "step3/show_bfd_peers_rt3_down.ref", 10, 2
)
# Check recovery, this can take some time
tgen.gears["rt3"].link_enable("eth-rt1", enabled=True)
router_compare_json_output(
"rt1", "show ip route ospf json", "step3/show_ip_route_healthy.ref"
)
router_compare_json_output(
"rt1", "show ipv6 route ospf json", "step3/show_ipv6_route_healthy.ref"
)
router_compare_json_output(
"rt1", "show bfd peers json", "step3/show_bfd_peers_healthy.ref"
)
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))
|
