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topotests: add new basic PIM topology test

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Test for PIM (re)convergence and BFD usage.

Signed-off-by: Rafael Zalamena <rzalamena@opensourcerouting.org>
This commit is contained in:
Rafael Zalamena 2021-04-12 16:47:38 -03:00
parent 1f3e6bf585
commit 0d00ac9cb5
16 changed files with 329 additions and 0 deletions
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tests/topotests/pim-basic-topo2/__init__.py Normal file
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tests/topotests/pim-basic-topo2/r1/bfdd.conf Normal file
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bfd
!

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tests/topotests/pim-basic-topo2/r1/pimd.conf Normal file
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interface r1-eth0
ip pim
ip pim bfd
!

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tests/topotests/pim-basic-topo2/r1/zebra.conf Normal file
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interface r1-eth0
ip address 192.168.1.1/24
!

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tests/topotests/pim-basic-topo2/r2/bfdd.conf Normal file
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bfd
!

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tests/topotests/pim-basic-topo2/r2/pimd.conf Normal file
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interface r2-eth0
ip pim
ip pim bfd
!
interface r2-eth1
ip pim
ip pim bfd
!
interface r2-eth2
ip pim
ip pim bfd
!

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tests/topotests/pim-basic-topo2/r2/zebra.conf Normal file
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interface r2-eth0
ip address 192.168.1.2/24
!
interface r2-eth1
ip address 192.168.2.1/24
!
interface r2-eth2
ip address 192.168.3.1/24
!

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tests/topotests/pim-basic-topo2/r3/bfdd.conf Normal file
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bfd
!

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tests/topotests/pim-basic-topo2/r3/pimd.conf Normal file
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interface r3-eth0
ip pim
ip pim bfd
!

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tests/topotests/pim-basic-topo2/r3/zebra.conf Normal file
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interface r3-eth0
ip address 192.168.2.3/24
!

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tests/topotests/pim-basic-topo2/r4/bfdd.conf Normal file
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bfd
!

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tests/topotests/pim-basic-topo2/r4/pimd.conf Normal file
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interface r4-eth0
ip pim
ip pim bfd
!

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tests/topotests/pim-basic-topo2/r4/zebra.conf Normal file
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interface r4-eth0
ip address 192.168.3.4/24
!

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tests/topotests/pim-basic-topo2/test_pim_basic_topo2.dot Normal file
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## Color coding:
#########################
## Main FRR: #f08080 red
## Switches: #d0e0d0 gray
## RIP: #19e3d9 Cyan
## RIPng: #fcb314 dark yellow
## OSPFv2: #32b835 Green
## OSPFv3: #19e3d9 Cyan
## ISIS IPv4 #fcb314 dark yellow
## ISIS IPv6 #9a81ec purple
## BGP IPv4 #eee3d3 beige
## BGP IPv6 #fdff00 yellow
##### Colors (see http://www.color-hex.com/)
graph template {
label="bfd-topo3";
# Routers
r1 [
shape=doubleoctagon,
label="r1",
fillcolor="#f08080",
style=filled,
];
r2 [
shape=doubleoctagon
label="r2",
fillcolor="#f08080",
style=filled,
];
r3 [
shape=doubleoctagon
label="r3",
fillcolor="#f08080",
style=filled,
];
r4 [
shape=doubleoctagon
label="r4",
fillcolor="#f08080",
style=filled,
];
# Switches
sw1 [
shape=oval,
label="sw1\n192.168.1.0/24",
fillcolor="#d0e0d0",
style=filled,
];
sw2 [
shape=oval,
label="sw2\n192.168.2.0/24",
fillcolor="#d0e0d0",
style=filled,
];
sw2 [
shape=oval,
label="sw2\n192.168.3.0/24",
fillcolor="#d0e0d0",
style=filled,
];
# Connections
r1 -- sw1 [label="eth0\n.1"];
r2 -- sw1 [label="eth0\n.2"];
r2 -- sw2 [label="eth1\n.1"];
r3 -- sw2 [label="eth0\n.3"];
r2 -- sw3 [label="eth1\n.1"];
r4 -- sw3 [label="eth2\n.4"];
}

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tests/topotests/pim-basic-topo2/test_pim_basic_topo2.py Normal file
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#!/usr/bin/env python
#
# test_pim_basic_topo2.py
# Part of NetDEF Topology Tests
#
# Copyright (c) 2021 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_pim_basic_topo2.py: Test the FRR PIM protocol convergence.
"""
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
# Required to instantiate the topology builder class.
from mininet.topo import Topo
pytestmark = [pytest.mark.bfdd, pytest.mark.bgpd, pytest.mark.isisd, pytest.mark.ospfd]
class PimBasicTopo2(Topo):
"Test topology builder"
def build(self, *_args, **_opts):
"Build function"
tgen = get_topogen(self)
# Create 4 routers
for routern in range(1, 5):
tgen.add_router("r{}".format(routern))
switch = tgen.add_switch("s1")
switch.add_link(tgen.gears["r1"])
switch.add_link(tgen.gears["r2"])
switch = tgen.add_switch("s2")
switch.add_link(tgen.gears["r2"])
switch.add_link(tgen.gears["r3"])
switch = tgen.add_switch("s3")
switch.add_link(tgen.gears["r2"])
switch.add_link(tgen.gears["r4"])
def setup_module(mod):
"Sets up the pytest environment"
tgen = Topogen(PimBasicTopo2, mod.__name__)
tgen.start_topology()
router_list = tgen.routers()
for rname, router in router_list.items():
daemon_file = "{}/{}/bfdd.conf".format(CWD, rname)
if os.path.isfile(daemon_file):
router.load_config(TopoRouter.RD_BFD, daemon_file)
daemon_file = "{}/{}/pimd.conf".format(CWD, rname)
if os.path.isfile(daemon_file):
router.load_config(TopoRouter.RD_PIM, daemon_file)
daemon_file = "{}/{}/zebra.conf".format(CWD, rname)
if os.path.isfile(daemon_file):
router.load_config(TopoRouter.RD_ZEBRA, daemon_file)
# Initialize all routers.
tgen.start_router()
def teardown_module(_mod):
"Teardown the pytest environment"
tgen = get_topogen()
tgen.stop_topology()
def expect_neighbor(router, interface, peer):
"Wait until peer is present on interface."
logger.info("waiting peer {} in {}".format(peer, interface))
tgen = get_topogen()
test_func = partial(
topotest.router_json_cmp,
tgen.gears[router],
"show ip pim neighbor json",
{interface: {peer: {}}}
)
_, result = topotest.run_and_expect(test_func, None, count=130, wait=1)
assertmsg = '"{}" PIM convergence failure'.format(router)
assert result is None, assertmsg
def test_wait_pim_convergence():
"Wait for PIM to converge"
tgen = get_topogen()
if tgen.routers_have_failure():
pytest.skip(tgen.errors)
logger.info("waiting for PIM to converge")
expect_neighbor('r1', 'r1-eth0', '192.168.1.2')
expect_neighbor('r2', 'r2-eth0', '192.168.1.1')
expect_neighbor('r2', 'r2-eth1', '192.168.2.3')
expect_neighbor('r2', 'r2-eth2', '192.168.3.4')
expect_neighbor('r3', 'r3-eth0', '192.168.2.1')
expect_neighbor('r4', 'r4-eth0', '192.168.3.1')
def test_bfd_peers():
"Wait for BFD peers to show up."
tgen = get_topogen()
if tgen.routers_have_failure():
pytest.skip(tgen.errors)
logger.info("waiting for BFD to converge")
def expect_bfd_peer(router, peer):
"Wait until peer is present on interface."
logger.info("waiting BFD peer {} in {}".format(peer, router))
test_func = partial(
topotest.router_json_cmp,
tgen.gears[router],
"show bfd peers json",
[{"peer": peer, "status": "up"}]
)
_, result = topotest.run_and_expect(test_func, None, count=10, wait=1)
assertmsg = '"{}" BFD convergence failure'.format(router)
assert result is None, assertmsg
expect_bfd_peer("r1", "192.168.1.2")
expect_bfd_peer("r2", "192.168.1.1")
expect_bfd_peer("r2", "192.168.2.3")
expect_bfd_peer("r2", "192.168.3.4")
expect_bfd_peer("r3", "192.168.2.1")
expect_bfd_peer("r4", "192.168.3.1")
def test_pim_reconvergence():
"Disconnect a peer and expect it to disconnect."
tgen = get_topogen()
if tgen.routers_have_failure():
pytest.skip(tgen.errors)
logger.info("waiting for disconnect convergence")
tgen.gears["r4"].link_enable("r4-eth0", enabled=False)
def expect_neighbor_down(router, interface, peer):
"Wait until peer is present on interface."
logger.info("waiting peer {} in {} to disappear".format(peer, interface))
test_func = partial(
topotest.router_json_cmp,
tgen.gears[router],
"show ip pim neighbor json",
{interface: {peer: None}}
)
_, result = topotest.run_and_expect(test_func, None, count=4, wait=1)
assertmsg = '"{}" PIM convergence failure'.format(router)
assert result is None, assertmsg
expect_neighbor_down("r2", "r2-eth2", "192.168.3.4")
logger.info("waiting for reconvergence")
tgen.gears["r4"].link_enable("r4-eth0", enabled=True)
expect_neighbor("r2", "r2-eth2", "192.168.3.4")
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))