372 lines
12 KiB
Python
372 lines
12 KiB
Python
#!/usr/bin/env python
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# SPDX-License-Identifier: ISC
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#
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# test_zebra_rib.py
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#
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# Copyright (c) 2019 by
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# Cumulus Networks, Inc
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# Donald Sharp
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#
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"""
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test_zebra_rib.py: Test some basic zebra <-> kernel interactions
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"""
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import os
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import re
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import sys
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from functools import partial
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import pytest
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import json
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import platform
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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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# 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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from time import sleep
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pytestmark = [pytest.mark.sharpd]
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krel = platform.release()
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def config_macvlan(tgen, r_str, device, macvlan):
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"Creates specified macvlan interace on physical device"
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if topotest.version_cmp(krel, "5.1") < 0:
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return
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router = tgen.gears[r_str]
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router.run(
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"ip link add {} link {} type macvlan mode bridge".format(macvlan, device)
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)
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router.run("ip link set {} up".format(macvlan))
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def setup_module(mod):
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"Sets up the pytest environment"
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# 8 links to 8 switches on r1
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topodef = {"s{}".format(x): ("r1",) for x in range(1, 9)}
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tgen = Topogen(topodef, 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_SHARP, os.path.join(CWD, "{}/sharpd.conf".format(rname))
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)
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# Macvlan interface for protodown func test */
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config_macvlan(tgen, "r1", "r1-eth0", "r1-eth0-macvlan")
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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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def test_zebra_kernel_route_vrf():
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"Test kernel routes should be removed after interface changes vrf"
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logger.info("Test kernel routes should be removed after interface changes vrf")
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vrf = "RED"
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tgen = get_topogen()
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r1 = tgen.gears["r1"]
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# Add kernel routes, the interface is initially in default vrf
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r1.run("ip route add 3.5.1.0/24 via 192.168.210.1 dev r1-eth0")
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json_file = "{}/r1/v4_route_1_vrf_before.json".format(CWD)
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expected = json.loads(open(json_file).read())
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test_func = partial(
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topotest.router_json_cmp, r1, "show ip route 3.5.1.0/24 json", expected
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)
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_, result = topotest.run_and_expect(test_func, None, count=5, wait=1)
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assert result is None, '"r1" JSON output mismatches'
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# Change the interface's vrf
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r1.run("ip link add {} type vrf table 1".format(vrf))
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r1.run("ip link set {} up".format(vrf))
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r1.run("ip link set dev r1-eth0 master {}".format(vrf))
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expected = "{}"
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test_func = partial(
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topotest.router_output_cmp, r1, "show ip route 3.5.1.0/24 json", expected
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)
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result, diff = topotest.run_and_expect(test_func, "", count=5, wait=1)
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assertmsg = "{} should not have the kernel route.\n{}".format('"r1"', diff)
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assert result, assertmsg
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# Clean up
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r1.run("ip link set dev r1-eth0 nomaster")
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r1.run("ip link del dev {}".format(vrf))
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def test_zebra_kernel_admin_distance():
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"Test some basic kernel routes added that should be accepted"
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logger.info("Test some basic kernel routes that should be accepted")
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tgen = get_topogen()
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if tgen.routers_have_failure():
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pytest.skip("skipped because of router(s) failure")
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r1 = tgen.gears["r1"]
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# Route with 255/8192 metric
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distance = 255
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metric = 8192
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def makekmetric(dist, metric):
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return (dist << 24) + metric
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r1.run(
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"ip route add 4.5.1.0/24 via 192.168.210.2 dev r1-eth0 metric "
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+ str(makekmetric(255, 8192))
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)
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# Route with 1/1 metric
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r1.run(
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"ip route add 4.5.2.0/24 via 192.168.211.2 dev r1-eth1 metric "
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+ str(makekmetric(1, 1))
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)
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# Route with 10/1 metric
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r1.run(
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"ip route add 4.5.3.0/24 via 192.168.212.2 dev r1-eth2 metric "
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+ str(makekmetric(10, 1))
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)
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# Same route with a 160/1 metric
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r1.run(
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"ip route add 4.5.3.0/24 via 192.168.213.2 dev r1-eth3 metric "
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+ str(makekmetric(160, 1))
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)
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# Currently I believe we have a bug here with the same route and different
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# metric. That needs to be properly resolved. Making a note for
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# coming back around later and fixing this.
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# tgen.mininet_cli()
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for i in range(1, 3):
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json_file = "{}/r1/v4_route_{}.json".format(CWD, i)
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expected = json.loads(open(json_file).read())
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test_func = partial(
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topotest.router_json_cmp,
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r1,
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"show ip route 4.5.{}.0 json".format(i),
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expected,
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)
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_, result = topotest.run_and_expect(test_func, None, count=20, wait=0.5)
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assertmsg = '"r1" JSON output mismatches'
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assert result is None, assertmsg
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# tgen.mininet_cli()
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def test_zebra_kernel_override():
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"Test that a FRR route with a lower admin distance takes over"
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logger.info("Test kernel override with a better admin distance")
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tgen = get_topogen()
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if tgen.routers_have_failure():
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pytest.skip("skipped because of previous test failure")
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r1 = tgen.gears["r1"]
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r1.vtysh_cmd("conf\nip route 4.5.1.0/24 192.168.216.3")
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json_file = "{}/r1/v4_route_1_static_override.json".format(CWD)
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expected = json.loads(open(json_file).read())
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test_func = partial(
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topotest.router_json_cmp, r1, "show ip route 4.5.1.0 json", expected
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)
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_, result = topotest.run_and_expect(test_func, None, count=20, wait=0.5)
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assert result is None, '"r1" JSON output mismatches'
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logger.info(
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"Test that the removal of the static route allows the kernel to take back over"
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)
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r1.vtysh_cmd("conf\nno ip route 4.5.1.0/24 192.168.216.3")
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json_file = "{}/r1/v4_route_1.json".format(CWD)
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expected = json.loads(open(json_file).read())
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test_func = partial(
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topotest.router_json_cmp, r1, "show ip route 4.5.1.0 json", expected
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)
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_, result = topotest.run_and_expect(test_func, None, count=20, wait=0.5)
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assert result is None, '"r1" JSON output mismatches'
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def test_route_map_usage():
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"Test that FRR only reruns over routes associated with the routemap"
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logger.info("Test that FRR runs on selected re's on route-map changes")
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tgen = get_topogen()
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if tgen.routers_have_failure():
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pytest.skip("Skipped because of previous test failure")
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thisDir = os.path.dirname(os.path.realpath(__file__))
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r1 = tgen.gears["r1"]
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# set the delay timer to 1 to improve test coverage (HA)
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r1.vtysh_cmd("conf\nzebra route-map delay-timer 1")
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r1.vtysh_cmd("conf\nroute-map static permit 10\nset src 192.168.215.1")
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r1.vtysh_cmd("conf\naccess-list 5 seq 5 permit 10.0.0.44/32")
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r1.vtysh_cmd("conf\naccess-list 10 seq 5 permit 10.0.1.0/24")
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r1.vtysh_cmd(
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"conf\nroute-map sharp permit 10\nmatch ip address 10\nset src 192.168.214.1"
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)
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r1.vtysh_cmd("conf\nroute-map sharp permit 20\nset src 192.168.213.1")
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r1.vtysh_cmd("conf\nip protocol static route-map static")
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r1.vtysh_cmd("conf\nip protocol sharp route-map sharp")
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sleep(4)
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r1.vtysh_cmd("conf\nip route 10.100.100.100/32 192.168.216.3")
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r1.vtysh_cmd("conf\nip route 10.100.100.101/32 10.0.0.44")
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r1.vtysh_cmd("sharp install route 10.0.0.0 nexthop 192.168.216.3 500")
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def check_initial_routes_installed(router):
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output = json.loads(router.vtysh_cmd("show ip route summ json"))
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expected = {
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"routes": [{"type": "static", "rib": 2}, {"type": "sharp", "rib": 500}]
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}
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return topotest.json_cmp(output, expected)
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test_func = partial(check_initial_routes_installed, r1)
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_, result = topotest.run_and_expect(test_func, None, count=40, wait=1)
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static_rmapfile = "%s/r1/static_rmap.ref" % (thisDir)
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expected = open(static_rmapfile).read().rstrip()
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expected = ("\n".join(expected.splitlines()) + "\n").rstrip()
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logger.info(
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"Does the show route-map static command run the correct number of times"
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)
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def check_static_map_correct_runs():
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actual = r1.vtysh_cmd("show route-map static")
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actual = ("\n".join(actual.splitlines()) + "\n").rstrip()
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return topotest.get_textdiff(
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actual,
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expected,
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title1="Actual Route-map output",
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title2="Expected Route-map output",
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)
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ok, result = topotest.run_and_expect(
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check_static_map_correct_runs, "", count=10, wait=1
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)
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assert ok, result
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sharp_rmapfile = "%s/r1/sharp_rmap.ref" % (thisDir)
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expected = open(sharp_rmapfile).read().rstrip()
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expected = ("\n".join(expected.splitlines()) + "\n").rstrip()
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logger.info("Does the show route-map sharp command run the correct number of times")
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def check_sharp_map_correct_runs():
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actual = r1.vtysh_cmd("show route-map sharp")
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actual = ("\n".join(actual.splitlines()) + "\n").rstrip()
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return topotest.get_textdiff(
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actual,
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expected,
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title1="Actual Route-map output",
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title2="Expected Route-map output",
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)
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ok, result = topotest.run_and_expect(
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check_sharp_map_correct_runs, "", count=10, wait=1
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)
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assert ok, result
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logger.info(
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"Add a extension to the static route-map to see the static route go away"
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" and test that the routes installed are correct"
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)
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r1.vtysh_cmd("conf\nroute-map sharp deny 5\nmatch ip address 5")
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# we are only checking the kernel here as that this will give us the implied
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# testing of both the route-map and staticd withdrawing the route
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# let's spot check that the routes were installed correctly
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# in the kernel
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sharp_ipfile = "%s/r1/iproute.ref" % (thisDir)
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expected = open(sharp_ipfile).read().rstrip()
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expected = ("\n".join(expected.splitlines()) + "\n").rstrip()
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def check_routes_installed():
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actual = r1.run("ip route show")
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actual = ("\n".join(actual.splitlines()) + "\n").rstrip()
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actual = re.sub(r" nhid [0-9][0-9]", "", actual)
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actual = re.sub(r" proto sharp", " proto XXXX", actual)
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actual = re.sub(r" proto static", " proto XXXX", actual)
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actual = re.sub(r" proto 194", " proto XXXX", actual)
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actual = re.sub(r" proto 196", " proto XXXX", actual)
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actual = re.sub(r" proto kernel", " proto XXXX", actual)
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actual = re.sub(r" proto 2", " proto XXXX", actual)
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# Some platforms have double spaces? Why??????
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actual = re.sub(r" proto XXXX ", " proto XXXX ", actual)
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actual = re.sub(r" metric", " metric", actual)
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actual = re.sub(r" link ", " link ", actual)
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return topotest.get_textdiff(
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actual,
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expected,
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title1="Actual ip route show",
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title2="Expected ip route show",
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)
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ok, result = topotest.run_and_expect(check_routes_installed, "", count=5, wait=1)
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assert ok, result
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def test_protodown():
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"Run protodown basic functionality test and report results."
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pdown = False
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count = 0
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tgen = get_topogen()
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if topotest.version_cmp(krel, "5.1") < 0:
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tgen.errors = "kernel 5.1 needed for protodown tests"
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pytest.skip(tgen.errors)
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r1 = tgen.gears["r1"]
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# Set interface protodown on
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r1.vtysh_cmd("sharp interface r1-eth0-macvlan protodown")
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# Timeout to wait for dplane to handle it
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while count < 10:
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count += 1
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output = r1.vtysh_cmd("show interface r1-eth0-macvlan")
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if re.search(r"protodown reasons:.*sharp", output):
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pdown = True
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break
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sleep(1)
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assert pdown is True, "Interface r1-eth0-macvlan not set protodown"
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# Set interface protodown off
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r1.vtysh_cmd("no sharp interface r1-eth0-macvlan protodown")
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# Timeout to wait for dplane to handle it
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while count < 10:
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count += 1
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output = r1.vtysh_cmd("show interface r1-eth0-macvlan")
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if not re.search(r"protodown reasons:.*sharp", output):
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pdown = False
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break
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sleep(1)
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assert pdown is False, "Interface r1-eth0-macvlan not set protodown off"
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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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