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-rw-r--r--test/test_kubeproxy.py203
1 files changed, 203 insertions, 0 deletions
diff --git a/test/test_kubeproxy.py b/test/test_kubeproxy.py
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+++ b/test/test_kubeproxy.py
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+import socket
+import unittest
+
+from scapy.layers.inet import IP, UDP
+from scapy.layers.inet6 import IPv6
+from scapy.layers.l2 import Ether
+from scapy.packet import Raw
+
+from framework import VppTestCase, running_extended_tests
+from util import ppp
+
+""" TestKP is a subclass of VPPTestCase classes.
+
+ TestKP class defines Four NAT test case for:
+ - IP4 to IP4 NAT
+ - IP4 to IP6 NAT
+ - IP6 to IP4 NAT
+ - IP6 to IP6 NAT
+
+"""
+
+
+class TestKP(VppTestCase):
+ """ Kube-proxy Test Case """
+
+ @classmethod
+ def setUpClass(cls):
+ super(TestKP, cls).setUpClass()
+ cls.pods = range(5)
+ cls.packets = range(5)
+
+ try:
+ cls.create_pg_interfaces(range(2))
+ cls.interfaces = list(cls.pg_interfaces)
+
+ for i in cls.interfaces:
+ i.admin_up()
+ i.config_ip4()
+ i.config_ip6()
+ i.disable_ipv6_ra()
+ i.resolve_arp()
+ i.resolve_ndp()
+ dst4 = socket.inet_pton(socket.AF_INET, "10.0.0.0")
+ dst6 = socket.inet_pton(socket.AF_INET6, "2002::")
+ cls.vapi.ip_add_del_route(dst4, 24, cls.pg1.remote_ip4n)
+ cls.vapi.ip_add_del_route(dst6, 16, cls.pg1.remote_ip6n, is_ipv6=1)
+ except Exception:
+ super(TestKP, cls).tearDownClass()
+ raise
+
+ def tearDown(self):
+ super(TestKP, self).tearDown()
+ if not self.vpp_dead:
+ self.logger.info(self.vapi.cli("show ku vip verbose"))
+
+ def getIPv4Flow(self, id):
+ return (IP(dst="90.0.%u.%u" % (id / 255, id % 255),
+ src="40.0.%u.%u" % (id / 255, id % 255)) /
+ UDP(sport=10000 + id, dport=3306))
+
+ def getIPv6Flow(self, id):
+ return (IPv6(dst="2001::%u" % (id), src="fd00:f00d:ffff::%u" % (id)) /
+ UDP(sport=10000 + id, dport=3306))
+
+ def generatePackets(self, src_if, isv4):
+ self.reset_packet_infos()
+ pkts = []
+ for pktid in self.packets:
+ info = self.create_packet_info(src_if, self.pg1)
+ payload = self.info_to_payload(info)
+ ip = self.getIPv4Flow(pktid) if isv4 else self.getIPv6Flow(pktid)
+ packet = (Ether(dst=src_if.local_mac, src=src_if.remote_mac) /
+ ip /
+ Raw(payload))
+ self.extend_packet(packet, 128)
+ info.data = packet.copy()
+ pkts.append(packet)
+ return pkts
+
+ def checkInner(self, udp):
+ self.assertEqual(udp.dport, 3307)
+
+ def checkCapture(self, nat4, isv4):
+ self.pg0.assert_nothing_captured()
+ out = self.pg1.get_capture(len(self.packets))
+
+ load = [0] * len(self.pods)
+ self.info = None
+ for p in out:
+ try:
+ podid = 0
+ udp = None
+ if nat4:
+ ip = p[IP]
+ podid = int(ip.dst.split(".")[3])
+ self.assertEqual(ip.version, 4)
+ self.assertEqual(ip.flags, 0)
+ self.assertEqual(ip.dst, "10.0.0.%u" % podid)
+ self.assertEqual(ip.proto, 17)
+ self.assertEqual(len(ip.options), 0)
+ self.assertGreaterEqual(ip.ttl, 63)
+ udp = p[UDP]
+ else:
+ ip = p[IPv6]
+ podid = ip.dst.split(":")
+ podid = podid[len(podid) - 1]
+ podid = 0 if podid == "" else int(podid)
+ self.assertEqual(ip.version, 6)
+ self.assertEqual(ip.tc, 0)
+ self.assertEqual(ip.fl, 0)
+ self.assertEqual(
+ socket.inet_pton(socket.AF_INET6, ip.dst),
+ socket.inet_pton(socket.AF_INET6, "2002::%u" % podid)
+ )
+ self.assertEqual(ip.nh, 17)
+ self.assertGreaterEqual(ip.hlim, 63)
+ udp = UDP(str(p[IPv6].payload))
+ # self.assertEqual(len(ip.options), 0)
+ self.checkInner(udp)
+ load[podid] += 1
+ except:
+ self.logger.error(ppp("Unexpected or invalid packet:", p))
+ raise
+
+ # This is just to roughly check that the balancing algorithm
+ # is not completly biased.
+ for podid in self.pods:
+ if load[podid] < len(self.packets) / (len(self.pods) * 2):
+ self.log(
+ "Pod isn't balanced: load[%d] = %d" % (podid, load[podid]))
+ raise Exception("Kube-proxy algorithm is biased")
+
+ def test_kp_ip4_nat4(self):
+ """ Kube-proxy NAT44 """
+ try:
+ self.vapi.cli("ku vip 90.0.0.0/8 port 3306 target_port 3307 nat4")
+ for podid in self.pods:
+ self.vapi.cli("ku pod 90.0.0.0/8 10.0.0.%u" % (podid))
+
+ self.pg0.add_stream(self.generatePackets(self.pg0, isv4=True))
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ self.checkCapture(nat4=True, isv4=True)
+
+ finally:
+ for podid in self.pods:
+ self.vapi.cli("ku pod 90.0.0.0/8 10.0.0.%u del" % (podid))
+ self.vapi.cli("ku vip 90.0.0.0/8 nat4 del")
+
+ @unittest.skipUnless(running_extended_tests(), "part of extended tests")
+ def test_kp_ip6_nat4(self):
+ """ Kube-proxy NAT64 """
+
+ try:
+ self.vapi.cli("ku vip 90.0.0.0/8 port 3306 target_port 3307 nat4")
+ for podid in self.pods:
+ self.vapi.cli("ku pod 2001::/16 10.0.0.%u" % (podid))
+
+ self.pg0.add_stream(self.generatePackets(self.pg0, isv4=False))
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+
+ self.checkCapture(nat4=True, isv4=False)
+ finally:
+ for podid in self.pods:
+ self.vapi.cli("ku pod 2001::/16 10.0.0.%u del" % (podid))
+ self.vapi.cli("ku vip 2001::/16 nat4 del")
+
+ @unittest.skipUnless(running_extended_tests(), "part of extended tests")
+ def test_kp_ip4_nat6(self):
+ """ Kube-proxy NAT46 """
+ try:
+ self.vapi.cli("ku vip 90.0.0.0/8 port 3306 target_port 3307 nat6")
+ for podid in self.pods:
+ self.vapi.cli("ku pod 90.0.0.0/8 2002::%u" % (podid))
+
+ self.pg0.add_stream(self.generatePackets(self.pg0, isv4=True))
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+
+ self.checkCapture(nat4=False, isv4=True)
+ finally:
+ for podid in self.pods:
+ self.vapi.cli("ku pod 90.0.0.0/8 2002::%u" % (podid))
+ self.vapi.cli("ku vip 90.0.0.0/8 nat6 del")
+
+ @unittest.skipUnless(running_extended_tests(), "part of extended tests")
+ def test_kp_ip6_nat6(self):
+ """ Kube-proxy NAT66 """
+ try:
+ self.vapi.cli("ku vip 90.0.0.0/8 port 3306 target_port 3307 nat6")
+ for podid in self.pods:
+ self.vapi.cli("ku pod 2001::/16 2002::%u" % (podid))
+
+ self.pg0.add_stream(self.generatePackets(self.pg0, isv4=False))
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+
+ self.checkCapture(nat4=False, isv4=False)
+ finally:
+ for podid in self.pods:
+ self.vapi.cli("ku pod 2001::/16 2002::%u del" % (podid))
+ self.vapi.cli("ku vip 2001::/16 nat6 del")