259 lines
8.5 KiB
Python
Executable file
259 lines
8.5 KiB
Python
Executable file
#!/usr/bin/env python
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# SPDX-License-Identifier: ISC
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#
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# test_bfd_ospf_topo1.py
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# Part of NetDEF Topology Tests
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#
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# Copyright (c) 2020 by
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# Network Device Education Foundation, Inc. ("NetDEF")
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#
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"""
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test_bfd_ospf_topo1.py:
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+---------+
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eth-rt2 (.1) | RT1 | eth-rt3 (.1)
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+----------+ 1.1.1.1 +----------+
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| | | |
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| +---------+ |
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| 10.0.2.0/24 |
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| eth-rt1 | (.2)
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| 10.0.1.0/24 +----+----+
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| | |
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| | RT3 |
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| | 3.3.3.3 |
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(.2) | eth-rt1 +----+----+
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+----+----+ eth-rt4 | (.1)
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| RT2 | |
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| 2.2.2.2 | 10.0.4.0/24 |
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+----+----+ |
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(.1) | eth-rt5 eth-rt3 | (.2)
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| +----+----+
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| | RT4 |
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| | 4.4.4.4 |
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| +----+----+
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| 10.0.3.0/24 eth-rt5 | (.1)
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| 10.0.5.0/24 |
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| +---------+ |
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+----------+ RT5 +----------+
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eth-rt2 (.2) | 5.5.5.5 | eth-rt4 (.2)
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+---------+
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"""
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import os
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import sys
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import pytest
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import json
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from functools import partial
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# Save the Current Working Directory to find configuration files.
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CWD = os.path.dirname(os.path.realpath(__file__))
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sys.path.append(os.path.join(CWD, "../"))
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# pylint: disable=C0413
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# Import topogen and topotest helpers
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from lib import topotest
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from lib.topogen import Topogen, TopoRouter, get_topogen
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from lib.topolog import logger
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pytestmark = [pytest.mark.bfdd, pytest.mark.ospfd]
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def setup_module(mod):
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"Sets up the pytest environment"
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topodef = {
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"s1": ("rt1:eth-rt2", "rt2:eth-rt1"),
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"s2": ("rt1:eth-rt3", "rt3:eth-rt1"),
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"s3": ("rt2:eth-rt5", "rt5:eth-rt2"),
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"s4": ("rt3:eth-rt4", "rt4:eth-rt3"),
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"s5": ("rt4:eth-rt5", "rt5:eth-rt4"),
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}
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tgen = Topogen(topodef, mod.__name__)
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tgen.start_topology()
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router_list = tgen.routers()
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# For all registered routers, load the zebra configuration file
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for rname, router in router_list.items():
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router.load_config(
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TopoRouter.RD_ZEBRA, os.path.join(CWD, "{}/zebra.conf".format(rname))
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)
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router.load_config(
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TopoRouter.RD_BFD, os.path.join(CWD, "{}/bfdd.conf".format(rname))
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)
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router.load_config(
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TopoRouter.RD_OSPF, os.path.join(CWD, "{}/ospfd.conf".format(rname))
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)
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router.load_config(
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TopoRouter.RD_OSPF6, os.path.join(CWD, "{}/ospf6d.conf".format(rname))
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)
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tgen.start_router()
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def teardown_module(mod):
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"Teardown the pytest environment"
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tgen = get_topogen()
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# This function tears down the whole topology.
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tgen.stop_topology()
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def print_cmd_result(rname, command):
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print(get_topogen().gears[rname].vtysh_cmd(command, isjson=False))
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def router_compare_json_output(rname, command, reference, count=40, wait=2):
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"Compare router JSON output"
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logger.info('Comparing router "%s" "%s" output', rname, command)
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tgen = get_topogen()
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filename = "{}/{}/{}".format(CWD, rname, reference)
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expected = json.loads(open(filename).read())
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# Run test function until we get an result. Wait at most 80 seconds.
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test_func = partial(topotest.router_json_cmp, tgen.gears[rname], command, expected)
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_, diff = topotest.run_and_expect(test_func, None, count=count, wait=wait)
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assertmsg = '"{}" JSON output mismatches the expected result'.format(rname)
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assert diff is None, assertmsg
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## TEST STEPS
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def test_rib_ospf_step1():
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logger.info("Test (step 1): verify RIB for OSPF")
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tgen = get_topogen()
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# Skip if previous fatal error condition is raised
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if tgen.routers_have_failure():
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pytest.skip(tgen.errors)
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router_compare_json_output(
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"rt1", "show ip route ospf json", "step1/show_ip_route.ref"
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)
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router_compare_json_output(
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"rt1", "show ipv6 route ospf json", "step1/show_ipv6_route.ref"
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)
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def test_bfd_ospf_sessions_step2():
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logger.info("Test (step 2): verify BFD peers for OSPF")
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tgen = get_topogen()
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# Skip if previous fatal error condition is raised
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if tgen.routers_have_failure():
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pytest.skip(tgen.errors)
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# BFD is just used on three routers
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for rt in ["rt1", "rt2", "rt3"]:
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router_compare_json_output(
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rt, "show bfd peers json", "step2/show_bfd_peers.ref"
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)
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def test_bfd_ospf_interface_failure_rt2_step3():
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logger.info("Test (step 3): Check failover handling with RT2 down")
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tgen = get_topogen()
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# Skip if previous fatal error condition is raised
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if tgen.routers_have_failure():
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pytest.skip(tgen.errors)
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# Let's kill the interface on rt2 and see what happens with the RIB and BFD on rt1
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tgen.gears["rt2"].link_enable("eth-rt1", enabled=False)
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# By default BFD provides a recovery time of 900ms plus jitter, so let's wait
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# initial 2 seconds to let the CI not suffer.
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topotest.sleep(2, "Wait for BFD down notification")
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router_compare_json_output(
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"rt1", "show ip route ospf json", "step3/show_ip_route_rt2_down.ref", 10, 2
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)
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router_compare_json_output(
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"rt1", "show ipv6 route ospf json", "step3/show_ipv6_route_rt2_down.ref", 10, 2
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)
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router_compare_json_output(
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"rt1", "show bfd peers json", "step3/show_bfd_peers_rt2_down.ref", 10, 2
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)
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# Check recovery, this can take some time
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tgen.gears["rt2"].link_enable("eth-rt1", enabled=True)
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router_compare_json_output(
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"rt1", "show ip route ospf json", "step3/show_ip_route_healthy.ref"
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)
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router_compare_json_output(
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"rt1", "show ipv6 route ospf json", "step3/show_ipv6_route_healthy.ref"
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)
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router_compare_json_output(
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"rt1", "show bfd peers json", "step3/show_bfd_peers_healthy.ref"
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)
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def test_bfd_ospf_interface_failure_rt3_step3():
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logger.info("Test (step 3): Check failover handling with RT3 down")
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tgen = get_topogen()
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# Skip if previous fatal error condition is raised
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if tgen.routers_have_failure():
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pytest.skip(tgen.errors)
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# Let's kill the interface on rt3 and see what happens with the RIB and BFD on rt1
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tgen.gears["rt3"].link_enable("eth-rt1", enabled=False)
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# By default BFD provides a recovery time of 900ms plus jitter, so let's wait
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# initial 2 seconds to let the CI not suffer.
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topotest.sleep(2, "Wait for BFD down notification")
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router_compare_json_output(
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"rt1", "show ip route ospf json", "step3/show_ip_route_rt3_down.ref", 10, 2
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)
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router_compare_json_output(
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"rt1", "show ipv6 route ospf json", "step3/show_ipv6_route_rt3_down.ref", 10, 2
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)
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router_compare_json_output(
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"rt1", "show bfd peers json", "step3/show_bfd_peers_rt3_down.ref", 10, 2
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)
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# Check recovery, this can take some time
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tgen.gears["rt3"].link_enable("eth-rt1", enabled=True)
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router_compare_json_output(
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"rt1", "show ip route ospf json", "step3/show_ip_route_healthy.ref"
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)
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router_compare_json_output(
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"rt1", "show ipv6 route ospf json", "step3/show_ipv6_route_healthy.ref"
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)
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router_compare_json_output(
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"rt1", "show bfd peers json", "step3/show_bfd_peers_healthy.ref"
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)
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def test_memory_leak():
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"Run the memory leak test and report results."
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tgen = get_topogen()
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if not tgen.is_memleak_enabled():
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pytest.skip("Memory leak test/report is disabled")
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tgen.report_memory_leaks()
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if __name__ == "__main__":
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args = ["-s"] + sys.argv[1:]
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sys.exit(pytest.main(args))
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