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#!/usr/bin/env python
# SPDX-License-Identifier: ISC
#
# test_bgp_vrf_netns_topo1.py
# Part of NetDEF Topology Tests
#
# Copyright (c) 2018 by 6WIND
#
"""
test_bgp_vrf_netns_topo1.py: Test BGP topology with EBGP on NETNS VRF
"""
import json
import os
import sys
import functools
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]
total_ebgp_peers = 1
CustomizeVrfWithNetns = True
#####################################################
##
## Network Topology Definition
##
#####################################################
def build_topo(tgen):
tgen.add_router("r1")
# Setup Switches
switch = tgen.add_switch("s1")
switch.add_link(tgen.gears["r1"])
# Add eBGP ExaBGP neighbors
peer_ip = "10.0.1.101"
peer_route = "via 10.0.1.1"
peer = tgen.add_exabgp_peer("peer1", ip=peer_ip, defaultRoute=peer_route)
switch = tgen.gears["s1"]
switch.add_link(peer)
#####################################################
##
## Tests starting
##
#####################################################
def setup_module(module):
tgen = Topogen(build_topo, module.__name__)
tgen.start_topology()
# Get r1 reference
router = tgen.gears["r1"]
# check for zebra capability
if CustomizeVrfWithNetns == True:
if router.check_capability(TopoRouter.RD_ZEBRA, "--vrfwnetns") == False:
return pytest.skip(
"Skipping BGP VRF NETNS Test. VRF NETNS backend not available on FRR"
)
if os.system("ip netns list") != 0:
return pytest.skip(
"Skipping BGP VRF NETNS Test. NETNS not available on System"
)
# retrieve VRF backend kind
if CustomizeVrfWithNetns == True:
logger.info("Testing with VRF Namespace support")
# create VRF r1-bgp-cust1
# move r1-eth0 to VRF r1-bgp-cust1
ns = "{}-bgp-cust1".format("r1")
router.net.add_netns(ns)
router.net.set_intf_netns("r1-eth0", ns, up=True)
# run daemons
router.load_config(TopoRouter.RD_MGMTD, None, "--vrfwnetns")
router.load_config(
TopoRouter.RD_ZEBRA,
os.path.join(CWD, "{}/zebra.conf".format("r1")),
"--vrfwnetns",
)
router.load_config(
TopoRouter.RD_BGP, os.path.join(CWD, "{}/bgpd.conf".format("r1"))
)
logger.info("Launching BGP and ZEBRA")
# BGP and ZEBRA start without underlying VRF
router.start()
# Starting Hosts and init ExaBGP on each of them
logger.info("starting exaBGP on peer1")
peer_list = tgen.exabgp_peers()
for pname, peer in peer_list.items():
peer_dir = os.path.join(CWD, pname)
env_file = os.path.join(CWD, "exabgp.env")
logger.info("Running ExaBGP peer")
peer.start(peer_dir, env_file)
logger.info(pname)
def teardown_module(module):
tgen = get_topogen()
# Move interfaces out of vrf namespace and delete the namespace
tgen.net["r1"].reset_intf_netns("r1-eth0")
tgen.net["r1"].delete_netns("r1-bgp-cust1")
tgen.stop_topology()
def test_bgp_vrf_learn():
"Test daemon learnt VRF context"
tgen = get_topogen()
# Skip if previous fatal error condition is raised
if tgen.routers_have_failure():
pytest.skip(tgen.errors)
# Expected result
output = tgen.gears["r1"].vtysh_cmd("show vrf", isjson=False)
logger.info("output is: {}".format(output))
output = tgen.gears["r1"].vtysh_cmd("show bgp vrfs", isjson=False)
logger.info("output is: {}".format(output))
def test_bgp_convergence():
"Test for BGP topology convergence"
tgen = get_topogen()
# uncomment if you want to troubleshoot
# tgen.mininet_cli()
# Skip if previous fatal error condition is raised
if tgen.routers_have_failure():
pytest.skip(tgen.errors)
logger.info("waiting for bgp convergence")
# Expected result
router = tgen.gears["r1"]
if router.has_version("<", "3.0"):
reffile = os.path.join(CWD, "r1/summary20.txt")
else:
reffile = os.path.join(CWD, "r1/summary.txt")
expected = json.loads(open(reffile).read())
test_func = functools.partial(
topotest.router_json_cmp,
router,
"show bgp vrf r1-bgp-cust1 summary json",
expected,
)
_, res = topotest.run_and_expect(test_func, None, count=90, wait=0.5)
assertmsg = "BGP router network did not converge"
assert res is None, assertmsg
def test_bgp_vrf_netns():
tgen = get_topogen()
# Skip if previous fatal error condition is raised
if tgen.routers_have_failure():
pytest.skip(tgen.errors)
expect = {
"routerId": "10.0.1.1",
"routes": {},
}
for subnet in range(0, 10):
netkey = "10.201.{}.0/24".format(subnet)
expect["routes"][netkey] = []
peer = {"valid": True}
expect["routes"][netkey].append(peer)
test_func = functools.partial(
topotest.router_json_cmp,
tgen.gears["r1"],
"show ip bgp vrf r1-bgp-cust1 ipv4 json",
expect,
)
_, res = topotest.run_and_expect(test_func, None, count=12, wait=0.5)
assertmsg = 'expected routes in "show ip bgp vrf r1-bgp-cust1 ipv4" output'
assert res is None, assertmsg
if __name__ == "__main__":
args = ["-s"] + sys.argv[1:]
ret = pytest.main(args)
sys.exit(ret)
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