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https://github.com/k3s-io/kubernetes.git
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Rewrite TestClusterIPEndpointsMore as TestClusterIPGeneral
Create some ClusterIP services and use runPacketFlowTests to test general functionality: - normal connection - hairpin connection - multiple endpoints - port != targetPort - multiple protocols on same port Remove the assertIPTablesRulesEqual test because the packet flow tests cover all of the details we care about here.
This commit is contained in:
Dan Winship
parent
ce7ffa8175
commit
2435da11d5
@ -2081,84 +2081,111 @@ func TestClusterIPReject(t *testing.T) {
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})
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}
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func TestClusterIPEndpointsMore(t *testing.T) {
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// TestClusterIPGeneral tests various basic features of a ClusterIP service
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func TestClusterIPGeneral(t *testing.T) {
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ipt := iptablestest.NewFake()
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fp := NewFakeProxier(ipt)
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svcIP := "172.30.0.41"
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svcPort := 80
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svcPortName := proxy.ServicePortName{
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NamespacedName: makeNSN("ns1", "svc1"),
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Port: "p80",
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Protocol: v1.ProtocolSCTP,
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}
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makeServiceMap(fp,
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makeTestService(svcPortName.Namespace, svcPortName.Name, func(svc *v1.Service) {
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svc.Spec.ClusterIP = svcIP
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makeTestService("ns1", "svc1", func(svc *v1.Service) {
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svc.Spec.ClusterIP = "172.30.0.41"
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svc.Spec.Ports = []v1.ServicePort{{
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Name: svcPortName.Port,
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Port: int32(svcPort),
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Protocol: v1.ProtocolSCTP,
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Name: "http",
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Port: 80,
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Protocol: v1.ProtocolTCP,
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}}
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}),
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makeTestService("ns2", "svc2", func(svc *v1.Service) {
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svc.Spec.ClusterIP = "172.30.0.42"
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svc.Spec.Ports = []v1.ServicePort{
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{
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Name: "http",
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Port: 80,
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Protocol: v1.ProtocolTCP,
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},
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{
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Name: "https",
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Port: 443,
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Protocol: v1.ProtocolTCP,
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TargetPort: intstr.FromInt32(8443),
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},
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{
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// Of course this should really be UDP, but if we
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// create a service with UDP ports, the Proxier will
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// try to do conntrack cleanup and we'd have to set
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// the FakeExec up to be able to deal with that...
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Name: "dns-sctp",
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Port: 53,
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Protocol: v1.ProtocolSCTP,
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},
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{
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Name: "dns-tcp",
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Port: 53,
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Protocol: v1.ProtocolTCP,
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// We use TargetPort on TCP but not SCTP to help
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// disambiguate the output.
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TargetPort: intstr.FromInt32(5353),
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},
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}
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}),
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)
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epIP := "10.180.0.1"
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populateEndpointSlices(fp,
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makeTestEndpointSlice(svcPortName.Namespace, svcPortName.Name, 1, func(eps *discovery.EndpointSlice) {
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makeTestEndpointSlice("ns1", "svc1", 1, func(eps *discovery.EndpointSlice) {
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eps.AddressType = discovery.AddressTypeIPv4
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eps.Endpoints = []discovery.Endpoint{{
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Addresses: []string{epIP},
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Addresses: []string{"10.180.0.1"},
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NodeName: pointer.String(testHostname),
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}}
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eps.Ports = []discovery.EndpointPort{{
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Name: pointer.String(svcPortName.Port),
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Port: pointer.Int32(int32(svcPort)),
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Protocol: &sctpProtocol,
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Name: pointer.String("http"),
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Port: pointer.Int32(80),
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Protocol: &tcpProtocol,
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}}
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}),
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makeTestEndpointSlice("ns2", "svc2", 1, func(eps *discovery.EndpointSlice) {
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eps.AddressType = discovery.AddressTypeIPv4
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eps.Endpoints = []discovery.Endpoint{
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{
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Addresses: []string{"10.180.0.1"},
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NodeName: pointer.String(testHostname),
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},
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{
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Addresses: []string{"10.180.2.1"},
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NodeName: pointer.String("host2"),
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},
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}
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eps.Ports = []discovery.EndpointPort{
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{
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Name: pointer.String("http"),
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Port: pointer.Int32(80),
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Protocol: &tcpProtocol,
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},
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{
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Name: pointer.String("https"),
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Port: pointer.Int32(8443),
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Protocol: &tcpProtocol,
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},
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{
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Name: pointer.String("dns-sctp"),
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Port: pointer.Int32(53),
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Protocol: &sctpProtocol,
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},
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{
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Name: pointer.String("dns-tcp"),
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Port: pointer.Int32(5353),
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Protocol: &tcpProtocol,
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},
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}
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}),
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)
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fp.syncProxyRules()
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expected := dedent.Dedent(`
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*filter
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:KUBE-NODEPORTS - [0:0]
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:KUBE-SERVICES - [0:0]
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:KUBE-EXTERNAL-SERVICES - [0:0]
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:KUBE-FIREWALL - [0:0]
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:KUBE-FORWARD - [0:0]
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:KUBE-PROXY-FIREWALL - [0:0]
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-A KUBE-FIREWALL -m comment --comment "block incoming localnet connections" -d 127.0.0.0/8 ! -s 127.0.0.0/8 -m conntrack ! --ctstate RELATED,ESTABLISHED,DNAT -j DROP
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-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
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-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
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-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
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COMMIT
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*nat
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:KUBE-NODEPORTS - [0:0]
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:KUBE-SERVICES - [0:0]
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:KUBE-MARK-MASQ - [0:0]
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:KUBE-POSTROUTING - [0:0]
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:KUBE-SEP-RFW33Y6OHVBQ4W3M - [0:0]
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:KUBE-SVC-GFCIFIA5VTFSTMSM - [0:0]
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-A KUBE-SERVICES -m comment --comment "ns1/svc1:p80 cluster IP" -m sctp -p sctp -d 172.30.0.41 --dport 80 -j KUBE-SVC-GFCIFIA5VTFSTMSM
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-A KUBE-SERVICES -m comment --comment "kubernetes service nodeports; NOTE: this must be the last rule in this chain" -m addrtype --dst-type LOCAL -j KUBE-NODEPORTS
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-A KUBE-MARK-MASQ -j MARK --or-mark 0x4000
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-A KUBE-POSTROUTING -m mark ! --mark 0x4000/0x4000 -j RETURN
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-A KUBE-POSTROUTING -j MARK --xor-mark 0x4000
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-A KUBE-POSTROUTING -m comment --comment "kubernetes service traffic requiring SNAT" -j MASQUERADE
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-A KUBE-SEP-RFW33Y6OHVBQ4W3M -m comment --comment ns1/svc1:p80 -s 10.180.0.1 -j KUBE-MARK-MASQ
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-A KUBE-SEP-RFW33Y6OHVBQ4W3M -m comment --comment ns1/svc1:p80 -m sctp -p sctp -j DNAT --to-destination 10.180.0.1:80
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-A KUBE-SVC-GFCIFIA5VTFSTMSM -m comment --comment "ns1/svc1:p80 cluster IP" -m sctp -p sctp -d 172.30.0.41 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
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-A KUBE-SVC-GFCIFIA5VTFSTMSM -m comment --comment "ns1/svc1:p80 -> 10.180.0.1:80" -j KUBE-SEP-RFW33Y6OHVBQ4W3M
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COMMIT
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`)
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assertIPTablesRulesEqual(t, getLine(), true, expected, fp.iptablesData.String())
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runPacketFlowTests(t, getLine(), ipt, testNodeIPs, []packetFlowTest{
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{
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name: "cluster IP accepted",
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name: "simple clusterIP",
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sourceIP: "10.180.0.2",
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protocol: v1.ProtocolSCTP,
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destIP: "172.30.0.41",
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destPort: 80,
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output: "10.180.0.1:80",
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@ -2167,12 +2194,60 @@ func TestClusterIPEndpointsMore(t *testing.T) {
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{
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name: "hairpin to cluster IP",
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sourceIP: "10.180.0.1",
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protocol: v1.ProtocolSCTP,
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destIP: "172.30.0.41",
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destPort: 80,
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output: "10.180.0.1:80",
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masq: true,
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},
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{
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name: "clusterIP with multiple endpoints",
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sourceIP: "10.180.0.2",
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destIP: "172.30.0.42",
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destPort: 80,
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output: "10.180.0.1:80, 10.180.2.1:80",
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masq: false,
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},
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{
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name: "clusterIP with TargetPort",
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sourceIP: "10.180.0.2",
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destIP: "172.30.0.42",
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destPort: 443,
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output: "10.180.0.1:8443, 10.180.2.1:8443",
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masq: false,
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},
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{
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name: "clusterIP with TCP and SCTP on same port (TCP)",
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sourceIP: "10.180.0.2",
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protocol: v1.ProtocolTCP,
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destIP: "172.30.0.42",
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destPort: 53,
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output: "10.180.0.1:5353, 10.180.2.1:5353",
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masq: false,
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},
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{
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name: "clusterIP with TCP and SCTP on same port (SCTP)",
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sourceIP: "10.180.0.2",
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protocol: v1.ProtocolSCTP,
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destIP: "172.30.0.42",
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destPort: 53,
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output: "10.180.0.1:53, 10.180.2.1:53",
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masq: false,
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},
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{
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name: "TCP-only port does not match UDP traffic",
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sourceIP: "10.180.0.2",
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protocol: v1.ProtocolUDP,
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destIP: "172.30.0.42",
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destPort: 80,
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output: "",
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},
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{
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name: "svc1 does not accept svc2's ports",
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sourceIP: "10.180.0.2",
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destIP: "172.30.0.41",
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destPort: 443,
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output: "",
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},
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})
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}
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