mirror of
https://github.com/k3s-io/kubernetes.git
synced 2025-07-20 10:20:51 +00:00
Merge pull request #96959 from tssurya/kube-proxy-iptables-perf-enhancements
Kube-proxy: perf-enhancement: Reduce NAT table KUBE-SERVICES/NODEPORTS chain rules
This commit is contained in:
Kubernetes Prow Robot
GitHub
commit
9b7b966508
@ -1062,23 +1062,22 @@ func (proxier *Proxier) syncProxyRules() {
|
||||
// Capture the clusterIP.
|
||||
if hasEndpoints {
|
||||
args = append(args[:0],
|
||||
"-A", string(kubeServicesChain),
|
||||
"-m", "comment", "--comment", fmt.Sprintf(`"%s cluster IP"`, svcNameString),
|
||||
"-m", protocol, "-p", protocol,
|
||||
"-d", utilproxy.ToCIDR(svcInfo.ClusterIP()),
|
||||
"--dport", strconv.Itoa(svcInfo.Port()),
|
||||
)
|
||||
if proxier.masqueradeAll {
|
||||
utilproxy.WriteLine(proxier.natRules, append(args, "-j", string(KubeMarkMasqChain))...)
|
||||
utilproxy.WriteRuleLine(proxier.natRules, string(svcChain), append(args, "-j", string(KubeMarkMasqChain))...)
|
||||
} else if proxier.localDetector.IsImplemented() {
|
||||
// This masquerades off-cluster traffic to a service VIP. The idea
|
||||
// is that you can establish a static route for your Service range,
|
||||
// routing to any node, and that node will bridge into the Service
|
||||
// for you. Since that might bounce off-node, we masquerade here.
|
||||
// If/when we support "Local" policy for VIPs, we should update this.
|
||||
utilproxy.WriteLine(proxier.natRules, proxier.localDetector.JumpIfNotLocal(args, string(KubeMarkMasqChain))...)
|
||||
utilproxy.WriteRuleLine(proxier.natRules, string(svcChain), proxier.localDetector.JumpIfNotLocal(args, string(KubeMarkMasqChain))...)
|
||||
}
|
||||
utilproxy.WriteLine(proxier.natRules, append(args, "-j", string(svcChain))...)
|
||||
utilproxy.WriteRuleLine(proxier.natRules, string(kubeServicesChain), append(args, "-j", string(svcChain))...)
|
||||
} else {
|
||||
// No endpoints.
|
||||
utilproxy.WriteLine(proxier.filterRules,
|
||||
@ -1129,7 +1128,6 @@ func (proxier *Proxier) syncProxyRules() {
|
||||
|
||||
if hasEndpoints {
|
||||
args = append(args[:0],
|
||||
"-A", string(kubeServicesChain),
|
||||
"-m", "comment", "--comment", fmt.Sprintf(`"%s external IP"`, svcNameString),
|
||||
"-m", protocol, "-p", protocol,
|
||||
"-d", utilproxy.ToCIDR(net.ParseIP(externalIP)),
|
||||
@ -1145,13 +1143,13 @@ func (proxier *Proxier) syncProxyRules() {
|
||||
destChain = svcChain
|
||||
// This masquerades off-cluster traffic to a External IP.
|
||||
if proxier.localDetector.IsImplemented() {
|
||||
utilproxy.WriteLine(proxier.natRules, proxier.localDetector.JumpIfNotLocal(args, string(KubeMarkMasqChain))...)
|
||||
utilproxy.WriteRuleLine(proxier.natRules, string(svcChain), proxier.localDetector.JumpIfNotLocal(args, string(KubeMarkMasqChain))...)
|
||||
} else {
|
||||
utilproxy.WriteLine(proxier.natRules, append(args, "-j", string(KubeMarkMasqChain))...)
|
||||
utilproxy.WriteRuleLine(proxier.natRules, string(svcChain), append(args, "-j", string(KubeMarkMasqChain))...)
|
||||
}
|
||||
}
|
||||
// Sent traffic bound for external IPs to the service chain.
|
||||
utilproxy.WriteLine(proxier.natRules, append(args, "-j", string(destChain))...)
|
||||
// Send traffic bound for external IPs to the service chain.
|
||||
utilproxy.WriteRuleLine(proxier.natRules, string(kubeServicesChain), append(args, "-j", string(destChain))...)
|
||||
|
||||
} else {
|
||||
// No endpoints.
|
||||
@ -1302,16 +1300,15 @@ func (proxier *Proxier) syncProxyRules() {
|
||||
|
||||
if hasEndpoints {
|
||||
args = append(args[:0],
|
||||
"-A", string(kubeNodePortsChain),
|
||||
"-m", "comment", "--comment", svcNameString,
|
||||
"-m", protocol, "-p", protocol,
|
||||
"--dport", strconv.Itoa(svcInfo.NodePort()),
|
||||
)
|
||||
if !svcInfo.NodeLocalExternal() {
|
||||
// Nodeports need SNAT, unless they're local.
|
||||
utilproxy.WriteLine(proxier.natRules, append(args, "-j", string(KubeMarkMasqChain))...)
|
||||
utilproxy.WriteRuleLine(proxier.natRules, string(svcChain), append(args, "-j", string(KubeMarkMasqChain))...)
|
||||
// Jump to the service chain.
|
||||
utilproxy.WriteLine(proxier.natRules, append(args, "-j", string(svcChain))...)
|
||||
utilproxy.WriteRuleLine(proxier.natRules, string(kubeNodePortsChain), append(args, "-j", string(svcChain))...)
|
||||
} else {
|
||||
// TODO: Make all nodePorts jump to the firewall chain.
|
||||
// Currently we only create it for loadbalancers (#33586).
|
||||
@ -1321,8 +1318,8 @@ func (proxier *Proxier) syncProxyRules() {
|
||||
if isIPv6 {
|
||||
loopback = "::1/128"
|
||||
}
|
||||
utilproxy.WriteLine(proxier.natRules, append(args, "-s", loopback, "-j", string(KubeMarkMasqChain))...)
|
||||
utilproxy.WriteLine(proxier.natRules, append(args, "-j", string(svcXlbChain))...)
|
||||
utilproxy.WriteRuleLine(proxier.natRules, string(kubeNodePortsChain), append(args, "-s", loopback, "-j", string(KubeMarkMasqChain))...)
|
||||
utilproxy.WriteRuleLine(proxier.natRules, string(kubeNodePortsChain), append(args, "-j", string(svcXlbChain))...)
|
||||
}
|
||||
} else {
|
||||
// No endpoints.
|
||||
|
||||
@ -21,6 +21,7 @@ import (
|
||||
"fmt"
|
||||
"net"
|
||||
"reflect"
|
||||
"sort"
|
||||
"strconv"
|
||||
"strings"
|
||||
"testing"
|
||||
@ -708,6 +709,220 @@ func errorf(msg string, rules []iptablestest.Rule, t *testing.T) {
|
||||
t.Errorf("%v", msg)
|
||||
}
|
||||
|
||||
// TestOverallIPTablesRulesWithMultipleServices creates 4 types of services: ClusterIP,
|
||||
// LoadBalancer, ExternalIP and NodePort and verifies if the NAT table rules created
|
||||
// are exactly the same as what is expected. This test provides an overall view of how
|
||||
// the NAT table rules look like with the different jumps.
|
||||
func TestOverallIPTablesRulesWithMultipleServices(t *testing.T) {
|
||||
ipt := iptablestest.NewFake()
|
||||
fp := NewFakeProxier(ipt, false)
|
||||
metrics.RegisterMetrics()
|
||||
|
||||
makeServiceMap(fp,
|
||||
// create ClusterIP service
|
||||
makeTestService(makeNSN("ns1", "svc1").Namespace, "svc1", func(svc *v1.Service) {
|
||||
svc.Spec.ClusterIP = "10.20.30.41"
|
||||
svc.Spec.Ports = []v1.ServicePort{{
|
||||
Name: "p80",
|
||||
Port: 80,
|
||||
Protocol: v1.ProtocolTCP,
|
||||
}}
|
||||
}),
|
||||
// create LoadBalancer service
|
||||
makeTestService(makeNSN("ns2", "svc2").Namespace, "svc2", func(svc *v1.Service) {
|
||||
svc.Spec.Type = "LoadBalancer"
|
||||
svc.Spec.ExternalTrafficPolicy = v1.ServiceExternalTrafficPolicyTypeLocal
|
||||
svc.Spec.ClusterIP = "10.20.30.42"
|
||||
svc.Spec.Ports = []v1.ServicePort{{
|
||||
Name: "p80",
|
||||
Port: 80,
|
||||
Protocol: v1.ProtocolTCP,
|
||||
NodePort: 3001,
|
||||
}}
|
||||
svc.Status.LoadBalancer.Ingress = []v1.LoadBalancerIngress{{
|
||||
IP: "1.2.3.4",
|
||||
}}
|
||||
// Also ensure that invalid LoadBalancerSourceRanges will not result
|
||||
// in a crash.
|
||||
svc.Spec.ExternalIPs = []string{"1.2.3.4"}
|
||||
svc.Spec.LoadBalancerSourceRanges = []string{" 1.2.3.4/28"}
|
||||
svc.Spec.HealthCheckNodePort = 30000
|
||||
}),
|
||||
// create NodePort service
|
||||
makeTestService(makeNSN("ns3", "svc3").Namespace, "svc3", func(svc *v1.Service) {
|
||||
svc.Spec.Type = "NodePort"
|
||||
svc.Spec.ClusterIP = "10.20.30.43"
|
||||
svc.Spec.Ports = []v1.ServicePort{{
|
||||
Name: "p80",
|
||||
Port: 80,
|
||||
Protocol: v1.ProtocolTCP,
|
||||
NodePort: 3001,
|
||||
}}
|
||||
}),
|
||||
// create ExternalIP service
|
||||
makeTestService(makeNSN("ns4", "svc4").Namespace, "svc4", func(svc *v1.Service) {
|
||||
svc.Spec.Type = "NodePort"
|
||||
svc.Spec.ClusterIP = "10.20.30.44"
|
||||
svc.Spec.ExternalIPs = []string{"50.60.70.81"}
|
||||
svc.Spec.Ports = []v1.ServicePort{{
|
||||
Name: "p80",
|
||||
Port: 80,
|
||||
Protocol: v1.ProtocolTCP,
|
||||
TargetPort: intstr.FromInt(80),
|
||||
}}
|
||||
}),
|
||||
)
|
||||
makeEndpointsMap(fp,
|
||||
// create ClusterIP service endpoints
|
||||
makeTestEndpoints(makeNSN("ns1", "svc1").Namespace, "svc1", func(ept *v1.Endpoints) {
|
||||
ept.Subsets = []v1.EndpointSubset{{
|
||||
Addresses: []v1.EndpointAddress{{
|
||||
IP: "10.180.0.1",
|
||||
}},
|
||||
Ports: []v1.EndpointPort{{
|
||||
Name: "p80",
|
||||
Port: 80,
|
||||
Protocol: v1.ProtocolTCP,
|
||||
}},
|
||||
}}
|
||||
}),
|
||||
// create LoadBalancer endpoints
|
||||
makeTestEndpoints(makeNSN("ns2", "svc2").Namespace, "svc2", func(ept *v1.Endpoints) {
|
||||
ept.Subsets = []v1.EndpointSubset{{
|
||||
Addresses: []v1.EndpointAddress{{
|
||||
IP: "10.180.0.2",
|
||||
}},
|
||||
Ports: []v1.EndpointPort{{
|
||||
Name: "p80",
|
||||
Port: 80,
|
||||
Protocol: v1.ProtocolTCP,
|
||||
}},
|
||||
}}
|
||||
}),
|
||||
// create NodePort service endpoints
|
||||
makeTestEndpoints(makeNSN("ns3", "svc3").Namespace, "svc3", func(ept *v1.Endpoints) {
|
||||
ept.Subsets = []v1.EndpointSubset{{
|
||||
Addresses: []v1.EndpointAddress{{
|
||||
IP: "10.180.0.3",
|
||||
}},
|
||||
Ports: []v1.EndpointPort{{
|
||||
Name: "p80",
|
||||
Port: 80,
|
||||
Protocol: v1.ProtocolTCP,
|
||||
}},
|
||||
}}
|
||||
}),
|
||||
// create ExternalIP service endpoints
|
||||
makeTestEndpoints(makeNSN("ns4", "svc4").Namespace, "svc4", func(ept *v1.Endpoints) {
|
||||
ept.Subsets = []v1.EndpointSubset{{
|
||||
Addresses: []v1.EndpointAddress{{
|
||||
IP: "10.180.0.4",
|
||||
NodeName: nil,
|
||||
}, {
|
||||
IP: "10.180.0.5",
|
||||
NodeName: utilpointer.StringPtr(testHostname),
|
||||
}},
|
||||
Ports: []v1.EndpointPort{{
|
||||
Name: "p80",
|
||||
Port: 80,
|
||||
Protocol: v1.ProtocolTCP,
|
||||
}},
|
||||
}}
|
||||
}),
|
||||
)
|
||||
|
||||
fp.syncProxyRules()
|
||||
|
||||
expected := `*filter
|
||||
:KUBE-SERVICES - [0:0]
|
||||
:KUBE-EXTERNAL-SERVICES - [0:0]
|
||||
:KUBE-FORWARD - [0:0]
|
||||
:KUBE-NODEPORTS - [0:0]
|
||||
-A KUBE-NODEPORTS -m comment --comment "ns2/svc2:p80 health check node port" -m tcp -p tcp --dport 30000 -j ACCEPT
|
||||
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
|
||||
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
|
||||
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack pod source rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
|
||||
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack pod destination rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
|
||||
COMMIT
|
||||
*nat
|
||||
:KUBE-SERVICES - [0:0]
|
||||
:KUBE-NODEPORTS - [0:0]
|
||||
:KUBE-POSTROUTING - [0:0]
|
||||
:KUBE-MARK-MASQ - [0:0]
|
||||
:KUBE-SVC-XPGD46QRK7WJZT7O - [0:0]
|
||||
:KUBE-SEP-SXIVWICOYRO3J4NJ - [0:0]
|
||||
:KUBE-SVC-GNZBNJ2PO5MGZ6GT - [0:0]
|
||||
:KUBE-XLB-GNZBNJ2PO5MGZ6GT - [0:0]
|
||||
:KUBE-FW-GNZBNJ2PO5MGZ6GT - [0:0]
|
||||
:KUBE-SEP-RS4RBKLTHTF2IUXJ - [0:0]
|
||||
:KUBE-SVC-X27LE4BHSL4DOUIK - [0:0]
|
||||
:KUBE-SEP-OYPFS5VJICHGATKP - [0:0]
|
||||
:KUBE-SVC-4SW47YFZTEDKD3PK - [0:0]
|
||||
:KUBE-SEP-UKSFD7AGPMPPLUHC - [0:0]
|
||||
:KUBE-SEP-C6EBXVWJJZMIWKLZ - [0:0]
|
||||
-A KUBE-POSTROUTING -m mark ! --mark 0x4000/0x4000 -j RETURN
|
||||
-A KUBE-POSTROUTING -j MARK --xor-mark 0x4000
|
||||
-A KUBE-POSTROUTING -m comment --comment "kubernetes service traffic requiring SNAT" -j MASQUERADE
|
||||
-A KUBE-MARK-MASQ -j MARK --or-mark 0x4000
|
||||
-A KUBE-SERVICES -m comment --comment "ns1/svc1:p80 cluster IP" -m tcp -p tcp -d 10.20.30.41/32 --dport 80 -j KUBE-SVC-XPGD46QRK7WJZT7O
|
||||
-A KUBE-SVC-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 cluster IP" -m tcp -p tcp -d 10.20.30.41/32 --dport 80 ! -s 10.0.0.0/24 -j KUBE-MARK-MASQ
|
||||
-A KUBE-SVC-XPGD46QRK7WJZT7O -m comment --comment ns1/svc1:p80 -j KUBE-SEP-SXIVWICOYRO3J4NJ
|
||||
-A KUBE-SEP-SXIVWICOYRO3J4NJ -m comment --comment ns1/svc1:p80 -s 10.180.0.1/32 -j KUBE-MARK-MASQ
|
||||
-A KUBE-SEP-SXIVWICOYRO3J4NJ -m comment --comment ns1/svc1:p80 -m tcp -p tcp -j DNAT --to-destination 10.180.0.1:80
|
||||
-A KUBE-SERVICES -m comment --comment "ns2/svc2:p80 cluster IP" -m tcp -p tcp -d 10.20.30.42/32 --dport 80 -j KUBE-SVC-GNZBNJ2PO5MGZ6GT
|
||||
-A KUBE-SERVICES -m comment --comment "ns2/svc2:p80 external IP" -m tcp -p tcp -d 1.2.3.4/32 --dport 80 -j KUBE-XLB-GNZBNJ2PO5MGZ6GT
|
||||
-A KUBE-SERVICES -m comment --comment "ns2/svc2:p80 loadbalancer IP" -m tcp -p tcp -d 1.2.3.4/32 --dport 80 -j KUBE-FW-GNZBNJ2PO5MGZ6GT
|
||||
-A KUBE-SVC-GNZBNJ2PO5MGZ6GT -m comment --comment "ns2/svc2:p80 cluster IP" -m tcp -p tcp -d 10.20.30.42/32 --dport 80 ! -s 10.0.0.0/24 -j KUBE-MARK-MASQ
|
||||
-A KUBE-SVC-GNZBNJ2PO5MGZ6GT -m comment --comment ns2/svc2:p80 -j KUBE-SEP-RS4RBKLTHTF2IUXJ
|
||||
-A KUBE-SEP-RS4RBKLTHTF2IUXJ -m comment --comment ns2/svc2:p80 -s 10.180.0.2/32 -j KUBE-MARK-MASQ
|
||||
-A KUBE-SEP-RS4RBKLTHTF2IUXJ -m comment --comment ns2/svc2:p80 -m tcp -p tcp -j DNAT --to-destination 10.180.0.2:80
|
||||
-A KUBE-FW-GNZBNJ2PO5MGZ6GT -m comment --comment "ns2/svc2:p80 loadbalancer IP" -s 1.2.3.4/28 -j KUBE-XLB-GNZBNJ2PO5MGZ6GT
|
||||
-A KUBE-FW-GNZBNJ2PO5MGZ6GT -m comment --comment "ns2/svc2:p80 loadbalancer IP" -j KUBE-MARK-DROP
|
||||
-A KUBE-NODEPORTS -m comment --comment ns2/svc2:p80 -m tcp -p tcp --dport 3001 -j KUBE-XLB-GNZBNJ2PO5MGZ6GT
|
||||
-A KUBE-NODEPORTS -m comment --comment ns2/svc2:p80 -m tcp -p tcp --dport 3001 -s 127.0.0.0/8 -j KUBE-MARK-MASQ
|
||||
-A KUBE-XLB-GNZBNJ2PO5MGZ6GT -m comment --comment "Redirect pods trying to reach external loadbalancer VIP to clusterIP" -s 10.0.0.0/24 -j KUBE-SVC-GNZBNJ2PO5MGZ6GT
|
||||
-A KUBE-XLB-GNZBNJ2PO5MGZ6GT -m comment --comment "masquerade LOCAL traffic for ns2/svc2:p80 LB IP" -m addrtype --src-type LOCAL -j KUBE-MARK-MASQ
|
||||
-A KUBE-XLB-GNZBNJ2PO5MGZ6GT -m comment --comment "route LOCAL traffic for ns2/svc2:p80 LB IP to service chain" -m addrtype --src-type LOCAL -j KUBE-SVC-GNZBNJ2PO5MGZ6GT
|
||||
-A KUBE-XLB-GNZBNJ2PO5MGZ6GT -m comment --comment "ns2/svc2:p80 has no local endpoints" -j KUBE-MARK-DROP
|
||||
-A KUBE-SERVICES -m comment --comment "ns3/svc3:p80 cluster IP" -m tcp -p tcp -d 10.20.30.43/32 --dport 80 -j KUBE-SVC-X27LE4BHSL4DOUIK
|
||||
-A KUBE-SVC-X27LE4BHSL4DOUIK -m comment --comment "ns3/svc3:p80 cluster IP" -m tcp -p tcp -d 10.20.30.43/32 --dport 80 ! -s 10.0.0.0/24 -j KUBE-MARK-MASQ
|
||||
-A KUBE-NODEPORTS -m comment --comment ns3/svc3:p80 -m tcp -p tcp --dport 3001 -j KUBE-SVC-X27LE4BHSL4DOUIK
|
||||
-A KUBE-SVC-X27LE4BHSL4DOUIK -m comment --comment ns3/svc3:p80 -m tcp -p tcp --dport 3001 -j KUBE-MARK-MASQ
|
||||
-A KUBE-SVC-X27LE4BHSL4DOUIK -m comment --comment ns3/svc3:p80 -j KUBE-SEP-OYPFS5VJICHGATKP
|
||||
-A KUBE-SEP-OYPFS5VJICHGATKP -m comment --comment ns3/svc3:p80 -s 10.180.0.3/32 -j KUBE-MARK-MASQ
|
||||
-A KUBE-SEP-OYPFS5VJICHGATKP -m comment --comment ns3/svc3:p80 -m tcp -p tcp -j DNAT --to-destination 10.180.0.3:80
|
||||
-A KUBE-SERVICES -m comment --comment "ns4/svc4:p80 cluster IP" -m tcp -p tcp -d 10.20.30.44/32 --dport 80 -j KUBE-SVC-4SW47YFZTEDKD3PK
|
||||
-A KUBE-SERVICES -m comment --comment "ns4/svc4:p80 external IP" -m tcp -p tcp -d 50.60.70.81/32 --dport 80 -j KUBE-SVC-4SW47YFZTEDKD3PK
|
||||
-A KUBE-SVC-4SW47YFZTEDKD3PK -m comment --comment "ns4/svc4:p80 cluster IP" -m tcp -p tcp -d 10.20.30.44/32 --dport 80 ! -s 10.0.0.0/24 -j KUBE-MARK-MASQ
|
||||
-A KUBE-SVC-4SW47YFZTEDKD3PK -m comment --comment "ns4/svc4:p80 external IP" -m tcp -p tcp -d 50.60.70.81/32 --dport 80 ! -s 10.0.0.0/24 -j KUBE-MARK-MASQ
|
||||
-A KUBE-SVC-4SW47YFZTEDKD3PK -m comment --comment ns4/svc4:p80 -m statistic --mode random --probability 0.5000000000 -j KUBE-SEP-UKSFD7AGPMPPLUHC
|
||||
-A KUBE-SVC-4SW47YFZTEDKD3PK -m comment --comment ns4/svc4:p80 -j KUBE-SEP-C6EBXVWJJZMIWKLZ
|
||||
-A KUBE-SEP-UKSFD7AGPMPPLUHC -m comment --comment ns4/svc4:p80 -s 10.180.0.4/32 -j KUBE-MARK-MASQ
|
||||
-A KUBE-SEP-UKSFD7AGPMPPLUHC -m comment --comment ns4/svc4:p80 -m tcp -p tcp -j DNAT --to-destination 10.180.0.4:80
|
||||
-A KUBE-SEP-C6EBXVWJJZMIWKLZ -m comment --comment ns4/svc4:p80 -s 10.180.0.5/32 -j KUBE-MARK-MASQ
|
||||
-A KUBE-SEP-C6EBXVWJJZMIWKLZ -m comment --comment ns4/svc4:p80 -m tcp -p tcp -j DNAT --to-destination 10.180.0.5:80
|
||||
-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
|
||||
COMMIT
|
||||
`
|
||||
// Adding logic to split and sort the strings because
|
||||
// depending on the creation order of services, the user-chains get jumbled.
|
||||
expectedSlice := strings.Split(strings.TrimSuffix(expected, "\n"), "\n")
|
||||
sort.Strings(expectedSlice)
|
||||
originalSlice := strings.Split(strings.TrimSuffix(fp.iptablesData.String(), "\n"), "\n")
|
||||
sort.Strings(originalSlice)
|
||||
|
||||
assert.Equal(t, expectedSlice, originalSlice)
|
||||
|
||||
nNatRules, err := testutil.GetGaugeMetricValue(metrics.IptablesRulesTotal.WithLabelValues(string(utiliptables.TableNAT)))
|
||||
if err != nil {
|
||||
t.Errorf("failed to get %s value, err: %v", metrics.IptablesRulesTotal.Name, err)
|
||||
}
|
||||
// 43 here is test specific and corresponds to one more than the number of -A lines after `*nat` in `expected`.
|
||||
if nNatRules != 43.0 {
|
||||
t.Fatalf("Wrong number of nat rules: expected 43 received %f", nNatRules)
|
||||
}
|
||||
}
|
||||
|
||||
func TestClusterIPReject(t *testing.T) {
|
||||
ipt := iptablestest.NewFake()
|
||||
fp := NewFakeProxier(ipt, false)
|
||||
@ -792,6 +1007,10 @@ func TestClusterIPEndpointsJump(t *testing.T) {
|
||||
}
|
||||
|
||||
svcRules := ipt.GetRules(svcChain)
|
||||
if !hasJump(svcRules, string(KubeMarkMasqChain), svcIP, svcPort) {
|
||||
errorf(fmt.Sprintf("Failed to find jump from %v to KUBE-MARK-MASQ chain", svcChain), svcRules, t)
|
||||
}
|
||||
|
||||
if !hasJump(svcRules, epChain, "", 0) {
|
||||
errorf(fmt.Sprintf("Failed to jump to ep chain %v", epChain), svcRules, t)
|
||||
}
|
||||
@ -925,6 +1144,11 @@ func TestNodePort(t *testing.T) {
|
||||
if !hasJump(kubeNodePortRules, svcChain, "", svcNodePort) {
|
||||
errorf(fmt.Sprintf("Failed to find jump to svc chain %v", svcChain), kubeNodePortRules, t)
|
||||
}
|
||||
expectedNodePortNonLocalTrafficMasqueradeRule := `-A KUBE-SVC-XPGD46QRK7WJZT7O -m comment --comment ns1/svc1:p80 -m tcp -p tcp --dport 3001 -j KUBE-MARK-MASQ`
|
||||
svcRules := ipt.GetRules(svcChain)
|
||||
if !strings.Contains(fp.iptablesData.String(), expectedNodePortNonLocalTrafficMasqueradeRule) {
|
||||
errorf(fmt.Sprintf("Didn't find the masquerade rule for node port non-local traffic in svc chain %v", svcChain), svcRules, t)
|
||||
}
|
||||
}
|
||||
|
||||
func TestHealthCheckNodePort(t *testing.T) {
|
||||
@ -1095,6 +1319,82 @@ func TestOnlyLocalExternalIPs(t *testing.T) {
|
||||
}
|
||||
}
|
||||
|
||||
// TestNonLocalExternalIPs tests if we add the masquerade rule into svcChain in order to
|
||||
// SNAT packets to external IPs if externalTrafficPolicy is cluster and the traffic is NOT Local.
|
||||
func TestNonLocalExternalIPs(t *testing.T) {
|
||||
ipt := iptablestest.NewFake()
|
||||
fp := NewFakeProxier(ipt, false)
|
||||
svcIP := "10.20.30.41"
|
||||
svcPort := 80
|
||||
svcExternalIPs := "50.60.70.81"
|
||||
svcPortName := proxy.ServicePortName{
|
||||
NamespacedName: makeNSN("ns1", "svc1"),
|
||||
Port: "p80",
|
||||
}
|
||||
|
||||
makeServiceMap(fp,
|
||||
makeTestService(svcPortName.Namespace, svcPortName.Name, func(svc *v1.Service) {
|
||||
svc.Spec.ClusterIP = svcIP
|
||||
svc.Spec.ExternalIPs = []string{svcExternalIPs}
|
||||
svc.Spec.Ports = []v1.ServicePort{{
|
||||
Name: svcPortName.Port,
|
||||
Port: int32(svcPort),
|
||||
Protocol: v1.ProtocolTCP,
|
||||
TargetPort: intstr.FromInt(svcPort),
|
||||
}}
|
||||
}),
|
||||
)
|
||||
makeEndpointsMap(fp)
|
||||
epIP1 := "10.180.0.1"
|
||||
epIP2 := "10.180.2.1"
|
||||
makeEndpointsMap(fp,
|
||||
makeTestEndpoints(svcPortName.Namespace, svcPortName.Name, func(ept *v1.Endpoints) {
|
||||
ept.Subsets = []v1.EndpointSubset{{
|
||||
Addresses: []v1.EndpointAddress{{
|
||||
IP: epIP1,
|
||||
NodeName: nil,
|
||||
}, {
|
||||
IP: epIP2,
|
||||
NodeName: utilpointer.StringPtr(testHostname),
|
||||
}},
|
||||
Ports: []v1.EndpointPort{{
|
||||
Name: svcPortName.Port,
|
||||
Port: int32(svcPort),
|
||||
Protocol: v1.ProtocolTCP,
|
||||
}},
|
||||
}}
|
||||
}),
|
||||
)
|
||||
|
||||
fp.syncProxyRules()
|
||||
proto := strings.ToLower(string(v1.ProtocolTCP))
|
||||
lbChain := string(serviceLBChainName(svcPortName.String(), proto))
|
||||
svcChain := string(servicePortChainName(svcPortName.String(), strings.ToLower(string(v1.ProtocolTCP))))
|
||||
|
||||
kubeSvcRules := ipt.GetRules(string(kubeServicesChain))
|
||||
if !hasJump(kubeSvcRules, svcChain, svcExternalIPs, svcPort) {
|
||||
errorf(fmt.Sprintf("Failed to find jump to svc chain %v", svcChain), kubeSvcRules, t)
|
||||
}
|
||||
|
||||
svcRules := ipt.GetRules(svcChain)
|
||||
if len(svcRules) != 4 {
|
||||
t.Errorf("expected svcChain %v to have 4 rules, got %v", svcChain, len(svcRules))
|
||||
}
|
||||
if !hasJump(svcRules, string(KubeMarkMasqChain), svcIP, svcPort) {
|
||||
errorf(fmt.Sprintf("Failed to find jump from %v to KUBE-MARK-MASQ chain", svcChain), svcRules, t)
|
||||
}
|
||||
expectedExternalIPNonLocalTrafficMasqueradeRule := `-A KUBE-SVC-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 external IP" -m tcp -p tcp -d 50.60.70.81/32 --dport 80 ! -s 10.0.0.0/24 -j KUBE-MARK-MASQ`
|
||||
|
||||
if !strings.Contains(fp.iptablesData.String(), expectedExternalIPNonLocalTrafficMasqueradeRule) {
|
||||
errorf(fmt.Sprintf("Didn't find the masquerade rule for external-ip non-local traffic in svc chain %v", svcChain), svcRules, t)
|
||||
}
|
||||
|
||||
lbRules := ipt.GetRules(lbChain)
|
||||
if len(lbRules) != 0 {
|
||||
t.Errorf("expected svclbChain %v to have 0 rules, got %v", lbChain, len(lbRules))
|
||||
}
|
||||
}
|
||||
|
||||
func TestNodePortReject(t *testing.T) {
|
||||
ipt := iptablestest.NewFake()
|
||||
fp := NewFakeProxier(ipt, false)
|
||||
@ -2671,7 +2971,7 @@ COMMIT
|
||||
-A KUBE-POSTROUTING -j MARK --xor-mark 0x4000
|
||||
-A KUBE-POSTROUTING -m comment --comment "kubernetes service traffic requiring SNAT" -j MASQUERADE
|
||||
-A KUBE-MARK-MASQ -j MARK --or-mark 0x4000
|
||||
-A KUBE-SERVICES -m comment --comment "ns1/svc1 cluster IP" -m tcp -p tcp -d 172.20.1.1/32 --dport 0 ! -s 10.0.0.0/24 -j KUBE-MARK-MASQ
|
||||
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 cluster IP" -m tcp -p tcp -d 172.20.1.1/32 --dport 0 ! -s 10.0.0.0/24 -j KUBE-MARK-MASQ
|
||||
-A KUBE-SERVICES -m comment --comment "ns1/svc1 cluster IP" -m tcp -p tcp -d 172.20.1.1/32 --dport 0 -j KUBE-SVC-AQI2S6QIMU7PVVRP
|
||||
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment ns1/svc1 -m statistic --mode random --probability 0.3333333333 -j KUBE-SEP-3JOIVZTXZZRGORX4
|
||||
-A KUBE-SEP-3JOIVZTXZZRGORX4 -m comment --comment ns1/svc1 -s 10.0.1.1/32 -j KUBE-MARK-MASQ
|
||||
@ -2771,7 +3071,7 @@ COMMIT
|
||||
-A KUBE-POSTROUTING -j MARK --xor-mark 0x4000
|
||||
-A KUBE-POSTROUTING -m comment --comment "kubernetes service traffic requiring SNAT" -j MASQUERADE
|
||||
-A KUBE-MARK-MASQ -j MARK --or-mark 0x4000
|
||||
-A KUBE-SERVICES -m comment --comment "ns1/svc1 cluster IP" -m tcp -p tcp -d 172.20.1.1/32 --dport 0 ! -s 10.0.0.0/24 -j KUBE-MARK-MASQ
|
||||
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 cluster IP" -m tcp -p tcp -d 172.20.1.1/32 --dport 0 ! -s 10.0.0.0/24 -j KUBE-MARK-MASQ
|
||||
-A KUBE-SERVICES -m comment --comment "ns1/svc1 cluster IP" -m tcp -p tcp -d 172.20.1.1/32 --dport 0 -j KUBE-SVC-AQI2S6QIMU7PVVRP
|
||||
-A KUBE-NODEPORTS -m comment --comment ns1/svc1 -m tcp -p tcp --dport 30010 -s 127.0.0.0/8 -j KUBE-MARK-MASQ
|
||||
-A KUBE-NODEPORTS -m comment --comment ns1/svc1 -m tcp -p tcp --dport 30010 -j KUBE-XLB-AQI2S6QIMU7PVVRP
|
||||
@ -3094,7 +3394,7 @@ COMMIT
|
||||
-A KUBE-POSTROUTING -j MARK --xor-mark 0x4000
|
||||
-A KUBE-POSTROUTING -m comment --comment "kubernetes service traffic requiring SNAT" -j MASQUERADE
|
||||
-A KUBE-MARK-MASQ -j MARK --or-mark 0x4000
|
||||
-A KUBE-SERVICES -m comment --comment "ns1/svc1 cluster IP" -m tcp -p tcp -d 172.20.1.1/32 --dport 80 ! -s 10.0.0.0/24 -j KUBE-MARK-MASQ
|
||||
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 cluster IP" -m tcp -p tcp -d 172.20.1.1/32 --dport 80 ! -s 10.0.0.0/24 -j KUBE-MARK-MASQ
|
||||
-A KUBE-SERVICES -m comment --comment "ns1/svc1 cluster IP" -m tcp -p tcp -d 172.20.1.1/32 --dport 80 -j KUBE-SVC-AQI2S6QIMU7PVVRP
|
||||
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment ns1/svc1 -m statistic --mode random --probability 0.3333333333 -j KUBE-SEP-3JOIVZTXZZRGORX4
|
||||
-A KUBE-SEP-3JOIVZTXZZRGORX4 -m comment --comment ns1/svc1 -s 10.0.1.1/32 -j KUBE-MARK-MASQ
|
||||
@ -3160,7 +3460,7 @@ COMMIT
|
||||
-A KUBE-POSTROUTING -j MARK --xor-mark 0x4000
|
||||
-A KUBE-POSTROUTING -m comment --comment "kubernetes service traffic requiring SNAT" -j MASQUERADE
|
||||
-A KUBE-MARK-MASQ -j MARK --or-mark 0x4000
|
||||
-A KUBE-SERVICES -m comment --comment "ns1/svc1 cluster IP" -m tcp -p tcp -d 172.20.1.1/32 --dport 80 ! -s 10.0.0.0/24 -j KUBE-MARK-MASQ
|
||||
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 cluster IP" -m tcp -p tcp -d 172.20.1.1/32 --dport 80 ! -s 10.0.0.0/24 -j KUBE-MARK-MASQ
|
||||
-A KUBE-SERVICES -m comment --comment "ns1/svc1 cluster IP" -m tcp -p tcp -d 172.20.1.1/32 --dport 80 -j KUBE-SVC-AQI2S6QIMU7PVVRP
|
||||
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment ns1/svc1 -j KUBE-SEP-3JOIVZTXZZRGORX4
|
||||
-A KUBE-SEP-3JOIVZTXZZRGORX4 -m comment --comment ns1/svc1 -s 10.0.1.1/32 -j KUBE-MARK-MASQ
|
||||
|
||||
@ -477,6 +477,18 @@ func WriteLine(buf *bytes.Buffer, words ...string) {
|
||||
}
|
||||
}
|
||||
|
||||
// WriteRuleLine prepends the strings "-A" and chainName to the buffer and calls
|
||||
// WriteLine to join all the words into the buffer and terminate with newline.
|
||||
func WriteRuleLine(buf *bytes.Buffer, chainName string, words ...string) {
|
||||
if len(words) == 0 {
|
||||
return
|
||||
}
|
||||
buf.WriteString("-A ")
|
||||
buf.WriteString(chainName)
|
||||
buf.WriteByte(' ')
|
||||
WriteLine(buf, words...)
|
||||
}
|
||||
|
||||
// WriteBytesLine write bytes to buffer, terminate with newline
|
||||
func WriteBytesLine(buf *bytes.Buffer, bytes []byte) {
|
||||
buf.Write(bytes)
|
||||
|
||||
@ -1183,6 +1183,44 @@ func TestWriteLine(t *testing.T) {
|
||||
}
|
||||
}
|
||||
|
||||
func TestWriteRuleLine(t *testing.T) {
|
||||
testCases := []struct {
|
||||
name string
|
||||
chainName string
|
||||
words []string
|
||||
expected string
|
||||
}{
|
||||
{
|
||||
name: "write no line due to no words",
|
||||
chainName: "KUBE-SVC-FOO",
|
||||
words: []string{},
|
||||
expected: "",
|
||||
},
|
||||
{
|
||||
name: "write one line",
|
||||
chainName: "KUBE-XLB-FOO",
|
||||
words: []string{"test1"},
|
||||
expected: "-A KUBE-XLB-FOO test1\n",
|
||||
},
|
||||
{
|
||||
name: "write multi word line",
|
||||
chainName: "lolChain",
|
||||
words: []string{"test1", "test2", "test3"},
|
||||
expected: "-A lolChain test1 test2 test3\n",
|
||||
},
|
||||
}
|
||||
testBuffer := bytes.NewBuffer(nil)
|
||||
for _, testCase := range testCases {
|
||||
t.Run(testCase.name, func(t *testing.T) {
|
||||
testBuffer.Reset()
|
||||
WriteRuleLine(testBuffer, testCase.chainName, testCase.words...)
|
||||
if !strings.EqualFold(testBuffer.String(), testCase.expected) {
|
||||
t.Fatalf("write word is %v\n expected: %s, got: %s", testCase.words, testCase.expected, testBuffer.String())
|
||||
}
|
||||
})
|
||||
}
|
||||
}
|
||||
|
||||
func TestWriteBytesLine(t *testing.T) {
|
||||
testCases := []struct {
|
||||
name string
|
||||
|
||||
Loading…
Reference in New Issue
Block a user