274 lines
8.1 KiB
Python
274 lines
8.1 KiB
Python
#!/usr/bin/env python
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# SPDX-License-Identifier: ISC
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#
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# test_ospf_te_topo1.py
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# Part of NetDEF Topology Tests
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#
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# Copyright (c) 2021 by Orange
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# Author: Olivier Dugeon <olivier.dugeon@orange.com>
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#
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"""
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test_ospf_te_topo1.py: Test the FRR OSPF with Traffic Engineering.
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+------------+
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| R1 |
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| 10.0.225.1 |
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+------------+
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eth0| |eth1
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10.0.0.0/24| |10.0.1.0/24
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eth0| |eth1
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+------------+ +------------+
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| | | |
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| R2 |eth2 eth0| R3 |
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| 10.0.255.2 +------------------+ 10.0.255.3 |
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| | 10.0.3.0/24 | |
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+------------+ +------+-----+
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eth3| eth1|
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10.0.4.0/24| 10.0.5.0/24|
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eth0| V
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+------------+ ASBR 10.0.255.5
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| R4 |
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| 10.0.255.4 |
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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 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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# Required to instantiate the topology builder class.
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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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# and Finally pytest
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import pytest
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pytestmark = [pytest.mark.ospfd]
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def build_topo(tgen):
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"Build function"
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# Create 4 routers
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r1 = tgen.add_router("r1")
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r2 = tgen.add_router("r2")
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r3 = tgen.add_router("r3")
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r4 = tgen.add_router("r4")
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# Interconect router 1 and 2 with 2 links
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tgen.add_link(r1, r2, ifname1="eth0", ifname2="eth0")
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tgen.add_link(r1, r2, ifname1="eth1", ifname2="eth1")
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# Interconect router 3 and 2
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tgen.add_link(r2, r3, ifname1="eth2", ifname2="eth0")
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# Interconect router 4 and 2
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tgen.add_link(r2, r4, ifname1="eth3", ifname2="eth0")
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# Interconnect router 3 with next AS
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s1 = tgen.add_switch("s1")
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tgen.add_link(r3, s1, ifname1="eth1", ifname2="eth0")
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def setup_module(mod):
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"Sets up the pytest environment"
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logger.info("\n\n---- Starting OSPF TE tests ----\n")
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tgen = Topogen(build_topo, mod.__name__)
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tgen.start_topology()
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router_list = tgen.routers()
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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_OSPF, os.path.join(CWD, "{}/ospfd.conf".format(rname))
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)
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# Initialize all routers.
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tgen.start_router()
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def teardown_module():
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"Teardown the pytest environment"
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tgen = get_topogen()
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tgen.stop_topology()
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logger.info("\n\n---- OSPF TE tests End ----\n")
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def compare_ted_json_output(tgen, rname, fileref):
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"Compare TED JSON output"
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logger.info('Comparing router "%s" TED output', rname)
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filename = "{}/reference/{}".format(CWD, fileref)
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expected = json.loads(open(filename).read())
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command = "show ip ospf mpls-te database json"
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# Run test function until we get an result. Wait at most 60 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=60, wait=2)
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assertmsg = '"{}" TED JSON output mismatches the expected result'.format(rname)
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assert diff is None, assertmsg
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def setup_testcase(msg):
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"Setup test case"
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logger.info(msg)
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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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return tgen
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# Note that all routers must discover the same Network Topology, so the same TED.
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def test_step1():
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"Step1: Check initial topology"
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tgen = setup_testcase("Step1: test initial OSPF TE Data Base")
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for rname in ["r1", "r2", "r3", "r4"]:
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compare_ted_json_output(tgen, rname, "ted_step1.json")
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def test_step2():
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"Step2: Shutdown interface between r1 and r2 and verify that \
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corresponding Edges are removed from the TED on all routers "
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tgen = setup_testcase("Step2: Shutdown interface between r1 & r2")
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tgen.net["r1"].cmd('vtysh -c "conf t" -c "interface eth1" -c "shutdown"')
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for rname in ["r1", "r2", "r3", "r4"]:
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compare_ted_json_output(tgen, rname, "ted_step2.json")
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def test_step3():
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"Step3: Disable Inter-AS on r3 and verify that corresponding Edge and \
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remote ASBR are removed from the TED on all routers"
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tgen = setup_testcase("Step3: Disable Inter-AS on r3")
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tgen.net["r3"].cmd('vtysh -c "conf t" -c "router ospf" -c "no mpls-te inter-as"')
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for rname in ["r1", "r2", "r3", "r4"]:
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compare_ted_json_output(tgen, rname, "ted_step3.json")
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def test_step4():
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"Step4: Enable Segment Routing on r1 and r2 and verify that corresponding \
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Edges are updated with Adjacency SID and Subnets with Prefix SID in the \
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TED on all routers"
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tgen = setup_testcase("Step4: Enable Segment Routing on r1 & r2")
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tgen.net["r1"].cmd('vtysh -c "conf t" -c "router ospf" -c "segment-routing on"')
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tgen.net["r1"].cmd(
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'vtysh -c "conf t" -c "router ospf" -c "segment-routing global-block 20000 23999"'
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)
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tgen.net["r1"].cmd(
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'vtysh -c "conf t" -c "router ospf" -c "segment-routing prefix 10.0.255.1/32 index 10"'
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)
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tgen.net["r2"].cmd('vtysh -c "conf t" -c "router ospf" -c "segment-routing on"')
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tgen.net["r2"].cmd(
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'vtysh -c "conf t" -c "router ospf" -c "segment-routing node-msd 16"'
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)
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tgen.net["r2"].cmd(
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'vtysh -c "conf t" -c "router ospf" -c "segment-routing global-block 16000 23999 local-block 5000 6999"'
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)
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tgen.net["r2"].cmd(
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'vtysh -c "conf t" -c "router ospf" -c "segment-routing prefix 10.0.255.2/32 index 20 explicit-null"'
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)
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for rname in ["r1", "r2", "r3", "r4"]:
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compare_ted_json_output(tgen, rname, "ted_step4.json")
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def test_step5():
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"Step5: Re-enable interface between r1 & r2 and verify that corresponding \
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Edges are added in the TED on all routers"
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tgen = setup_testcase("Step5: Re-enable interface between r1 & r2")
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tgen.net["r1"].cmd('vtysh -c "conf t" -c "interface eth1" -c "no shutdown"')
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for rname in ["r1", "r2", "r3", "r4"]:
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compare_ted_json_output(tgen, rname, "ted_step5.json")
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def test_step6():
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"Step6: Set delay and jitter for interface eth0 on r4, remove use-bw \
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for interface eth3 on r2 and verify that corresponding Edges are \
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updated in the TED on all routers"
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tgen = setup_testcase("Step6: Modify link parameters on r2 & r4")
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tgen.net["r2"].cmd(
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'vtysh -c "conf t" -c "interface eth3" -c "link-params" -c "no use-bw"'
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)
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tgen.net["r4"].cmd(
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'vtysh -c "conf t" -c "interface eth0" -c "link-params" -c "delay 20000"'
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)
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tgen.net["r4"].cmd(
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'vtysh -c "conf t" -c "interface eth0" -c "link-params" -c "delay-variation 10000"'
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)
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for rname in ["r1", "r2", "r3", "r4"]:
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compare_ted_json_output(tgen, rname, "ted_step6.json")
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def test_step7():
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"Step7: Disable OSPF on r4 and verify that corresponding Vertex, Edges and \
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Subnets are removed from the TED on all remaining routers"
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tgen = setup_testcase("Step7: Disable OSPF on r4")
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tgen.net["r4"].cmd('vtysh -c "conf t" -c "no router ospf"')
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for rname in ["r1", "r2", "r3"]:
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compare_ted_json_output(tgen, rname, "ted_step7.json")
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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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