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#!/usr/bin/env python
# SPDX-License-Identifier: ISC
#
# test_bgp_vpnv4_ebgp.py
# Part of NetDEF Topology Tests
#
# Copyright (c) 2022 by 6WIND
#
"""
test_bgp_vpnv4_ebgp.py: Test the FRR BGP daemon with EBGP direct connection
"""
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.
pytestmark = [pytest.mark.bgpd]
def build_topo(tgen):
"Build function"
# Create 2 routers.
tgen.add_router("r1")
tgen.add_router("r2")
tgen.add_router("r3")
switch = tgen.add_switch("s1")
switch.add_link(tgen.gears["r1"])
switch.add_link(tgen.gears["r2"])
switch.add_link(tgen.gears["r3"])
switch = tgen.add_switch("s2")
switch.add_link(tgen.gears["r1"])
switch = tgen.add_switch("s3")
switch.add_link(tgen.gears["r2"])
switch = tgen.add_switch("s4")
switch.add_link(tgen.gears["r3"])
def _populate_iface():
tgen = get_topogen()
cmds_list = [
"ip link add vrf1 type vrf table 10",
"echo 100000 > /proc/sys/net/mpls/platform_labels",
"ip link set dev vrf1 up",
"ip link set dev {0}-eth1 master vrf1",
"echo 1 > /proc/sys/net/mpls/conf/{0}-eth0/input",
]
for cmd in cmds_list:
input = cmd.format("r1")
logger.info("input: " + cmd)
output = tgen.net["r1"].cmd(cmd.format("r1"))
logger.info("output: " + output)
for cmd in cmds_list:
input = cmd.format("r2")
logger.info("input: " + cmd)
output = tgen.net["r2"].cmd(cmd.format("r2"))
logger.info("output: " + output)
for cmd in cmds_list:
input = cmd.format("r3")
logger.info("input: " + cmd)
output = tgen.net["r3"].cmd(cmd.format("r3"))
logger.info("output: " + output)
def setup_module(mod):
"Sets up the pytest environment"
tgen = Topogen(build_topo, mod.__name__)
tgen.start_topology()
router_list = tgen.routers()
_populate_iface()
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_BGP, os.path.join(CWD, "{}/bgpd.conf".format(rname))
)
# Initialize all routers.
tgen.start_router()
def teardown_module(_mod):
"Teardown the pytest environment"
tgen = get_topogen()
tgen.stop_topology()
def test_protocols_convergence():
"""
Assert that all protocols have converged
statuses as they depend on it.
"""
tgen = get_topogen()
if tgen.routers_have_failure():
pytest.skip(tgen.errors)
router = tgen.gears["r1"]
logger.info("Dump some context for r1")
router.vtysh_cmd("show bgp ipv4 vpn")
router.vtysh_cmd("show bgp summary")
router.vtysh_cmd("show bgp vrf vrf1 ipv4")
router.vtysh_cmd("show running-config")
router = tgen.gears["r2"]
logger.info("Dump some context for r2")
router.vtysh_cmd("show bgp ipv4 vpn")
router.vtysh_cmd("show bgp summary")
router.vtysh_cmd("show bgp vrf vrf1 ipv4")
router.vtysh_cmd("show running-config")
# Check IPv4 routing tables on r1
logger.info("Checking IPv4 routes for convergence on r1")
router = tgen.gears["r1"]
json_file = "{}/{}/ipv4_routes.json".format(CWD, router.name)
if not os.path.isfile(json_file):
logger.info("skipping file {}".format(json_file))
assert 0, "ipv4_routes.json file not found"
return
expected = json.loads(open(json_file).read())
test_func = partial(
topotest.router_json_cmp,
router,
"show ip route vrf vrf1 json",
expected,
)
_, result = topotest.run_and_expect(test_func, None, count=40, wait=2)
assertmsg = '"{}" JSON output mismatches'.format(router.name)
assert result is None, assertmsg
# Check BGP IPv4 routing tables on r1
logger.info("Checking BGP IPv4 routes for convergence on r1")
router = tgen.gears["r1"]
json_file = "{}/{}/bgp_ipv4_routes.json".format(CWD, router.name)
if not os.path.isfile(json_file):
assert 0, "bgp_ipv4_routes.json file not found"
expected = json.loads(open(json_file).read())
test_func = partial(
topotest.router_json_cmp,
router,
"show bgp vrf vrf1 ipv4 json",
expected,
)
_, result = topotest.run_and_expect(test_func, None, count=40, wait=2)
assertmsg = '"{}" JSON output mismatches'.format(router.name)
assert result is None, assertmsg
# Check BGP IPv4 imported entry is not detected as local
# "selectionReason": "Locally configured route"
donna = tgen.gears["r1"].vtysh_cmd(
"show bgp vrf vrf1 ipv4 172.31.0.10/32 json", isjson=True
)
routes = donna["paths"]
selectionReasonFound = False
for route in routes:
if "bestpath" not in route.keys():
continue
if "selectionReason" not in route["bestpath"].keys():
continue
if "Locally configured route" == route["bestpath"]["selectionReason"]:
assert 0, "imported prefix has wrong reason detected"
selectionReasonFound = True
if not selectionReasonFound:
assertmsg = '"{}" imported prefix has wrong reason detected'.format(router.name)
assert False, assertmsg
# Check BGP IPv4 routing tables on r2 not installed
logger.info("Checking BGP IPv4 routes for convergence on r2")
router = tgen.gears["r2"]
json_file = "{}/{}/bgp_ipv4_routes.json".format(CWD, router.name)
if not os.path.isfile(json_file):
assert 0, "bgp_ipv4_routes.json file not found"
expected = json.loads(open(json_file).read())
test_func = partial(
topotest.router_json_cmp,
router,
"show bgp vrf vrf1 ipv4 json",
expected,
)
_, result = topotest.run_and_expect(test_func, None, count=40, wait=2)
assertmsg = '"{}" JSON output mismatches'.format(router.name)
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))
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