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frr/tests/topotests/ospf_basic_functionality/test_ospf_ecmp_lan.py
whitespace 701a01920e *: reformat python files 
We are now using black.

Signed-off-by: Quentin Young <qlyoung@nvidia.com>
2020-10-07 17:22:26 -04:00

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Python
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#!/usr/bin/python
#
# Copyright (c) 2020 by VMware, Inc. ("VMware")
# Used Copyright (c) 2018 by Network Device Education Foundation, Inc.
# ("NetDEF") in this file.
#
# 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 VMWARE DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL VMWARE 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.
#
"""OSPF Basic Functionality Automation."""
import os
import sys
import time
import pytest
import json
# Save the Current Working Directory to find configuration files.
CWD = os.path.dirname(os.path.realpath(__file__))
sys.path.append(os.path.join(CWD, "../"))
sys.path.append(os.path.join(CWD, "../lib/"))
# pylint: disable=C0413
# Import topogen and topotest helpers
from mininet.topo import Topo
from lib.topogen import Topogen, get_topogen
# Import topoJson from lib, to create topology and initial configuration
from lib.common_config import (
start_topology,
write_test_header,
create_interfaces_cfg,
write_test_footer,
reset_config_on_routers,
verify_rib,
create_static_routes,
check_address_types,
step,
create_route_maps,
shutdown_bringup_interface,
stop_router,
start_router,
topo_daemons,
)
from lib.bgp import verify_bgp_convergence, create_router_bgp
from lib.topolog import logger
from lib.topojson import build_topo_from_json, build_config_from_json
from lib.ospf import (
verify_ospf_neighbor,
config_ospf_interface,
clear_ospf,
verify_ospf_rib,
create_router_ospf,
verify_ospf_interface,
)
from ipaddress import IPv4Address
# Global variables
topo = None
# Reading the data from JSON File for topology creation
jsonFile = "{}/ospf_ecmp_lan.json".format(CWD)
try:
with open(jsonFile, "r") as topoJson:
topo = json.load(topoJson)
except IOError:
assert False, "Could not read file {}".format(jsonFile)
NETWORK = {
"ipv4": [
"11.0.20.1/32",
"11.0.20.2/32",
"11.0.20.3/32",
"11.0.20.4/32",
"11.0.20.5/32",
],
"ipv6": ["1::1/128", "1::2/128", "1::3/128", "1::4/128", "1::5/128"],
}
MASK = {"ipv4": "32", "ipv6": "128"}
NEXT_HOP = {
"ipv4": ["10.0.0.1", "10.0.1.1", "10.0.2.1", "10.0.3.1", "10.0.4.1"],
"ipv6": ["Null0", "Null0", "Null0", "Null0", "Null0"],
}
"""
TOPOOLOGY =
Please view in a fixed-width font such as Courier.
Topo : Broadcast Networks
+---+ +---+ +---+ +---+
|R0 + +R1 + +R2 + +R3 |
+-+-+ +-+-+ +-+-+ +-+-+
| | | |
| | | |
--+-----------+--------------+---------------+-----
Ethernet Segment
TESTCASES =
1. Verify OSPF ECMP with max path configured as 8
(Edge having 1 uplink port as broadcast network,
connect to 8 TORs - LAN case)
"""
class CreateTopo(Topo):
"""
Test topology builder.
* `Topo`: Topology object
"""
def build(self, *_args, **_opts):
"""Build function."""
tgen = get_topogen(self)
# Building topology from json file
build_topo_from_json(tgen, topo)
def setup_module(mod):
"""
Sets up the pytest environment
* `mod`: module name
"""
global topo
testsuite_run_time = time.asctime(time.localtime(time.time()))
logger.info("Testsuite start time: {}".format(testsuite_run_time))
logger.info("=" * 40)
logger.info("Running setup_module to create topology")
# This function initiates the topology build with Topogen...
tgen = Topogen(CreateTopo, mod.__name__)
# ... and here it calls Mininet initialization functions.
# get list of daemons needs to be started for this suite.
daemons = topo_daemons(tgen, topo)
# Starting topology, create tmp files which are loaded to routers
# to start deamons and then start routers
start_topology(tgen, daemons)
# Creating configuration from JSON
build_config_from_json(tgen, topo)
# Don't run this test if we have any failure.
if tgen.routers_have_failure():
pytest.skip(tgen.errors)
# Api call verify whether OSPF is converged
ospf_covergence = verify_ospf_neighbor(tgen, topo, lan=True)
assert ospf_covergence is True, "setup_module :Failed \n Error:" " {}".format(
ospf_covergence
)
logger.info("Running setup_module() done")
def teardown_module():
"""Teardown the pytest environment"""
logger.info("Running teardown_module to delete topology")
tgen = get_topogen()
try:
# Stop toplogy and Remove tmp files
tgen.stop_topology()
except OSError:
# OSError exception is raised when mininet tries to stop switch
# though switch is stopped once but mininet tries to stop same
# switch again, where it ended up with exception
pass
def red_static(dut, config=True):
"""Local def for Redstribute static routes inside ospf."""
global topo
tgen = get_topogen()
if config:
ospf_red = {dut: {"ospf": {"redistribute": [{"redist_type": "static"}]}}}
else:
ospf_red = {
dut: {
"ospf": {
"redistribute": [{"redist_type": "static", "del_action": True}]
}
}
}
result = create_router_ospf(tgen, topo, ospf_red)
assert result is True, "Testcase : Failed \n Error: {}".format(result)
def red_connected(dut, config=True):
"""Local def for Redstribute connected routes inside ospf."""
global topo
tgen = get_topogen()
if config:
ospf_red = {dut: {"ospf": {"redistribute": [{"redist_type": "connected"}]}}}
else:
ospf_red = {
dut: {
"ospf": {
"redistribute": [{"redist_type": "connected", "del_action": True}]
}
}
}
result = create_router_ospf(tgen, topo, ospf_red)
assert result is True, "Testcase: Failed \n Error: {}".format(result)
# ##################################
# Test cases start here.
# ##################################
def test_ospf_lan_ecmp_tc18_p0(request):
"""
OSPF ECMP.
Verify OSPF ECMP with max path configured as 8
(Edge having 1 uplink port as broadcast network,
connect to 8 TORs - LAN case)
"""
tc_name = request.node.name
write_test_header(tc_name)
tgen = get_topogen()
# Don't run this test if we have any failure.
if tgen.routers_have_failure():
pytest.skip(tgen.errors)
global topo
step("Bring up the base config as per the topology")
step(". Configure ospf in all the routers on LAN interface.")
reset_config_on_routers(tgen)
step("Verify that OSPF is up with 8 neighborship sessions.")
ospf_covergence = verify_ospf_neighbor(tgen, topo, lan=True)
assert ospf_covergence is True, "setup_module :Failed \n Error:" " {}".format(
ospf_covergence
)
step(
"Configure a static route in all the routes and "
"redistribute static/connected in OSPF."
)
for rtr in topo["routers"]:
input_dict = {
rtr: {
"static_routes": [
{"network": NETWORK["ipv4"][0], "no_of_ip": 5, "next_hop": "Null0"}
]
}
}
result = create_static_routes(tgen, input_dict)
assert result is True, "Testcase {} : Failed \n Error: {}".format(
tc_name, result
)
dut = rtr
red_static(dut)
step(
"Verify that route in R0 in stalled with 8 hops. "
"Verify ospf route table and ip route table."
)
nh = []
for rtr in topo["routers"]:
nh.append(topo["routers"][rtr]["links"]["s1"]["ipv4"].split("/")[0])
nh.remove(topo["routers"]["r1"]["links"]["s1"]["ipv4"].split("/")[0])
dut = "r1"
result = verify_ospf_rib(tgen, dut, input_dict, next_hop=nh)
assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
protocol = "ospf"
result = verify_rib(tgen, "ipv4", dut, input_dict, protocol=protocol, next_hop=nh)
assert result is True, "Testcase {} : Failed \n Error: {}".format(tc_name, result)
step(" clear ip ospf interface on DUT(r0)")
clear_ospf(tgen, "r0")
step(
"Verify that after clearing the ospf interface all the "
"neighbours are up and routes are installed with 8 next hop "
"in ospf and ip route tables on R0"
)
dut = "r0"
ospf_covergence = verify_ospf_neighbor(tgen, topo, dut=dut, lan=True)
assert ospf_covergence is True, "setup_module :Failed \n Error:" " {}".format(
ospf_covergence
)
step(" clear ip ospf interface on R2")
clear_ospf(tgen, "r2")
dut = "r2"
ospf_covergence = verify_ospf_neighbor(tgen, topo, dut=dut, lan=True)
assert ospf_covergence is True, "setup_module :Failed \n Error:" " {}".format(
ospf_covergence
)
step("Delete static/connected cmd in ospf in all the routes one by one.")
for rtr in topo["routers"]:
input_dict = {
rtr: {
"static_routes": [
{
"network": NETWORK["ipv4"][0],
"no_of_ip": 5,
"next_hop": "Null0",
"delete": True,
}
]
}
}
result = create_static_routes(tgen, input_dict)
assert result is True, "Testcase {} : Failed \n Error: {}".format(
tc_name, result
)
step("Verify that all the routes are withdrawn from R0")
dut = "r1"
result = verify_ospf_rib(
tgen, dut, input_dict, next_hop=nh, attempts=5, expected=False
)
assert result is not True, "Testcase {} : Failed \n Error: {}".format(
tc_name, result
)
protocol = "ospf"
result = verify_rib(
tgen,
"ipv4",
dut,
input_dict,
protocol=protocol,
next_hop=nh,
attempts=5,
expected=False,
)
assert result is not True, "Testcase {} : Failed \n Error: {}".format(
tc_name, result
)
write_test_footer(tc_name)
if __name__ == "__main__":
args = ["-s"] + sys.argv[1:]
sys.exit(pytest.main(args))
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