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Kube-proxy: perf-enhancement: Reduce NAT table KUBE-SERVICES/NODEPORTS chain rules
The nat KUBE-SERVICES chain is called from OUTPUT and PREROUTING stages. In clusters with large number of services, the nat-KUBE-SERVICES chain is the largest chain with for eg: 33k rules. This patch aims to move the KubeMarkMasq rules from the kubeServicesChain into the respective KUBE-SVC-* chains. This way during each packet-rule matching we won't have to traverse the MASQ rules of all services which get accumulated in the KUBE-SERVICES and/or KUBE-NODEPORTS chains. Since the jump to KUBE-MARK-MASQ ultimately sets the 0x400 mark for nodeIP SNAT, it should not matter whether the jump is made from KUBE-SERVICES or KUBE-SVC-* chains. Specifically we change: 1) For ClusterIP svc, we move the KUBE-MARK-MASQ jump rule from KUBE-SERVICES chain into KUBE-SVC-* chain. 2) For ExternalIP svc, we move the KUBE-MARK-MASQ jump rule in the case of non-ServiceExternalTrafficPolicyTypeLocal from KUBE-SERVICES chain into KUBE-SVC-* chain. 3) For NodePorts svc, we move the KUBE-MARK-MASQ jump rule in case of non-ServiceExternalTrafficPolicyTypeLocal from KUBE-NODEPORTS chain to KUBE-SVC-* chain. 4) For load-balancer svc, we don't change anything since it is already svc specific due to creation of KUBE-FW-* chains per svc. This would cut the rules per svc in KUBE-SERVICES and KUBE-NODEPORTS in half.
This commit is contained in:
Surya Seetharaman
parent
667e50abc8
commit
d3fe48e848
@ -1062,23 +1062,22 @@ func (proxier *Proxier) syncProxyRules() {
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// Capture the clusterIP.
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if hasEndpoints {
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args = append(args[:0],
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"-A", string(kubeServicesChain),
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"-m", "comment", "--comment", fmt.Sprintf(`"%s cluster IP"`, svcNameString),
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"-m", protocol, "-p", protocol,
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"-d", utilproxy.ToCIDR(svcInfo.ClusterIP()),
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"--dport", strconv.Itoa(svcInfo.Port()),
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)
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if proxier.masqueradeAll {
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utilproxy.WriteLine(proxier.natRules, append(args, "-j", string(KubeMarkMasqChain))...)
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utilproxy.WriteRuleLine(proxier.natRules, string(svcChain), append(args, "-j", string(KubeMarkMasqChain))...)
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} else if proxier.localDetector.IsImplemented() {
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// This masquerades off-cluster traffic to a service VIP. The idea
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// is that you can establish a static route for your Service range,
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// routing to any node, and that node will bridge into the Service
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// for you. Since that might bounce off-node, we masquerade here.
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// If/when we support "Local" policy for VIPs, we should update this.
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utilproxy.WriteLine(proxier.natRules, proxier.localDetector.JumpIfNotLocal(args, string(KubeMarkMasqChain))...)
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utilproxy.WriteRuleLine(proxier.natRules, string(svcChain), proxier.localDetector.JumpIfNotLocal(args, string(KubeMarkMasqChain))...)
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}
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utilproxy.WriteLine(proxier.natRules, append(args, "-j", string(svcChain))...)
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utilproxy.WriteRuleLine(proxier.natRules, string(kubeServicesChain), append(args, "-j", string(svcChain))...)
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} else {
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// No endpoints.
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utilproxy.WriteLine(proxier.filterRules,
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@ -1129,7 +1128,6 @@ func (proxier *Proxier) syncProxyRules() {
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if hasEndpoints {
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args = append(args[:0],
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"-A", string(kubeServicesChain),
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"-m", "comment", "--comment", fmt.Sprintf(`"%s external IP"`, svcNameString),
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"-m", protocol, "-p", protocol,
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"-d", utilproxy.ToCIDR(net.ParseIP(externalIP)),
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@ -1145,13 +1143,13 @@ func (proxier *Proxier) syncProxyRules() {
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destChain = svcChain
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// This masquerades off-cluster traffic to a External IP.
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if proxier.localDetector.IsImplemented() {
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utilproxy.WriteLine(proxier.natRules, proxier.localDetector.JumpIfNotLocal(args, string(KubeMarkMasqChain))...)
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utilproxy.WriteRuleLine(proxier.natRules, string(svcChain), proxier.localDetector.JumpIfNotLocal(args, string(KubeMarkMasqChain))...)
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} else {
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utilproxy.WriteLine(proxier.natRules, append(args, "-j", string(KubeMarkMasqChain))...)
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utilproxy.WriteRuleLine(proxier.natRules, string(svcChain), append(args, "-j", string(KubeMarkMasqChain))...)
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}
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}
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// Sent traffic bound for external IPs to the service chain.
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utilproxy.WriteLine(proxier.natRules, append(args, "-j", string(destChain))...)
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// Send traffic bound for external IPs to the service chain.
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utilproxy.WriteRuleLine(proxier.natRules, string(kubeServicesChain), append(args, "-j", string(destChain))...)
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} else {
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// No endpoints.
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@ -1302,16 +1300,15 @@ func (proxier *Proxier) syncProxyRules() {
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if hasEndpoints {
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args = append(args[:0],
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"-A", string(kubeNodePortsChain),
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"-m", "comment", "--comment", svcNameString,
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"-m", protocol, "-p", protocol,
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"--dport", strconv.Itoa(svcInfo.NodePort()),
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)
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if !svcInfo.NodeLocalExternal() {
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// Nodeports need SNAT, unless they're local.
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utilproxy.WriteLine(proxier.natRules, append(args, "-j", string(KubeMarkMasqChain))...)
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utilproxy.WriteRuleLine(proxier.natRules, string(svcChain), append(args, "-j", string(KubeMarkMasqChain))...)
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// Jump to the service chain.
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utilproxy.WriteLine(proxier.natRules, append(args, "-j", string(svcChain))...)
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utilproxy.WriteRuleLine(proxier.natRules, string(kubeNodePortsChain), append(args, "-j", string(svcChain))...)
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} else {
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// TODO: Make all nodePorts jump to the firewall chain.
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// Currently we only create it for loadbalancers (#33586).
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@ -1321,8 +1318,8 @@ func (proxier *Proxier) syncProxyRules() {
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if isIPv6 {
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loopback = "::1/128"
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}
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utilproxy.WriteLine(proxier.natRules, append(args, "-s", loopback, "-j", string(KubeMarkMasqChain))...)
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utilproxy.WriteLine(proxier.natRules, append(args, "-j", string(svcXlbChain))...)
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utilproxy.WriteRuleLine(proxier.natRules, string(kubeNodePortsChain), append(args, "-s", loopback, "-j", string(KubeMarkMasqChain))...)
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utilproxy.WriteRuleLine(proxier.natRules, string(kubeNodePortsChain), append(args, "-j", string(svcXlbChain))...)
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}
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} else {
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// No endpoints.
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@ -865,14 +865,14 @@ COMMIT
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-A KUBE-POSTROUTING -m comment --comment "kubernetes service traffic requiring SNAT" -j MASQUERADE
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-A KUBE-MARK-MASQ -j MARK --or-mark 0x4000
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-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
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-A KUBE-SERVICES -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
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-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
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-A KUBE-SVC-XPGD46QRK7WJZT7O -m comment --comment ns1/svc1:p80 -j KUBE-SEP-SXIVWICOYRO3J4NJ
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-A KUBE-SEP-SXIVWICOYRO3J4NJ -m comment --comment ns1/svc1:p80 -s 10.180.0.1/32 -j KUBE-MARK-MASQ
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-A KUBE-SEP-SXIVWICOYRO3J4NJ -m comment --comment ns1/svc1:p80 -m tcp -p tcp -j DNAT --to-destination 10.180.0.1:80
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-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
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-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
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-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
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-A KUBE-SERVICES -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
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-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
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-A KUBE-SVC-GNZBNJ2PO5MGZ6GT -m comment --comment ns2/svc2:p80 -j KUBE-SEP-RS4RBKLTHTF2IUXJ
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-A KUBE-SEP-RS4RBKLTHTF2IUXJ -m comment --comment ns2/svc2:p80 -s 10.180.0.2/32 -j KUBE-MARK-MASQ
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-A KUBE-SEP-RS4RBKLTHTF2IUXJ -m comment --comment ns2/svc2:p80 -m tcp -p tcp -j DNAT --to-destination 10.180.0.2:80
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@ -885,16 +885,16 @@ COMMIT
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-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
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-A KUBE-XLB-GNZBNJ2PO5MGZ6GT -m comment --comment "ns2/svc2:p80 has no local endpoints" -j KUBE-MARK-DROP
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-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
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-A KUBE-SERVICES -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
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-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
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-A KUBE-NODEPORTS -m comment --comment ns3/svc3:p80 -m tcp -p tcp --dport 3001 -j KUBE-SVC-X27LE4BHSL4DOUIK
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-A KUBE-NODEPORTS -m comment --comment ns3/svc3:p80 -m tcp -p tcp --dport 3001 -j KUBE-MARK-MASQ
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-A KUBE-SVC-X27LE4BHSL4DOUIK -m comment --comment ns3/svc3:p80 -m tcp -p tcp --dport 3001 -j KUBE-MARK-MASQ
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-A KUBE-SVC-X27LE4BHSL4DOUIK -m comment --comment ns3/svc3:p80 -j KUBE-SEP-OYPFS5VJICHGATKP
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-A KUBE-SEP-OYPFS5VJICHGATKP -m comment --comment ns3/svc3:p80 -s 10.180.0.3/32 -j KUBE-MARK-MASQ
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-A KUBE-SEP-OYPFS5VJICHGATKP -m comment --comment ns3/svc3:p80 -m tcp -p tcp -j DNAT --to-destination 10.180.0.3:80
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-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
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-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
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-A KUBE-SERVICES -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
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-A KUBE-SERVICES -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
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-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
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-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
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-A KUBE-SVC-4SW47YFZTEDKD3PK -m comment --comment ns4/svc4:p80 -m statistic --mode random --probability 0.5000000000 -j KUBE-SEP-UKSFD7AGPMPPLUHC
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-A KUBE-SVC-4SW47YFZTEDKD3PK -m comment --comment ns4/svc4:p80 -j KUBE-SEP-C6EBXVWJJZMIWKLZ
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-A KUBE-SEP-UKSFD7AGPMPPLUHC -m comment --comment ns4/svc4:p80 -s 10.180.0.4/32 -j KUBE-MARK-MASQ
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@ -1007,6 +1007,10 @@ func TestClusterIPEndpointsJump(t *testing.T) {
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}
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svcRules := ipt.GetRules(svcChain)
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if !hasJump(svcRules, string(KubeMarkMasqChain), svcIP, svcPort) {
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errorf(fmt.Sprintf("Failed to find jump from %v to KUBE-MARK-MASQ chain", svcChain), svcRules, t)
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}
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if !hasJump(svcRules, epChain, "", 0) {
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errorf(fmt.Sprintf("Failed to jump to ep chain %v", epChain), svcRules, t)
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}
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@ -1140,6 +1144,11 @@ func TestNodePort(t *testing.T) {
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if !hasJump(kubeNodePortRules, svcChain, "", svcNodePort) {
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errorf(fmt.Sprintf("Failed to find jump to svc chain %v", svcChain), kubeNodePortRules, t)
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}
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expectedNodePortNonLocalTrafficMasqueradeRule := `-A KUBE-SVC-XPGD46QRK7WJZT7O -m comment --comment ns1/svc1:p80 -m tcp -p tcp --dport 3001 -j KUBE-MARK-MASQ`
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svcRules := ipt.GetRules(svcChain)
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if !strings.Contains(fp.iptablesData.String(), expectedNodePortNonLocalTrafficMasqueradeRule) {
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errorf(fmt.Sprintf("Didn't find the masquerade rule for node port non-local traffic in svc chain %v", svcChain), svcRules, t)
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}
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}
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func TestHealthCheckNodePort(t *testing.T) {
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@ -1310,6 +1319,82 @@ func TestOnlyLocalExternalIPs(t *testing.T) {
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}
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}
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// TestNonLocalExternalIPs tests if we add the masquerade rule into svcChain in order to
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// SNAT packets to external IPs if externalTrafficPolicy is cluster and the traffic is NOT Local.
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func TestNonLocalExternalIPs(t *testing.T) {
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ipt := iptablestest.NewFake()
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fp := NewFakeProxier(ipt, false)
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svcIP := "10.20.30.41"
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svcPort := 80
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svcExternalIPs := "50.60.70.81"
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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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}
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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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svc.Spec.ExternalIPs = []string{svcExternalIPs}
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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.ProtocolTCP,
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TargetPort: intstr.FromInt(svcPort),
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}}
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}),
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)
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makeEndpointsMap(fp)
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epIP1 := "10.180.0.1"
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epIP2 := "10.180.2.1"
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makeEndpointsMap(fp,
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makeTestEndpoints(svcPortName.Namespace, svcPortName.Name, func(ept *v1.Endpoints) {
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ept.Subsets = []v1.EndpointSubset{{
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Addresses: []v1.EndpointAddress{{
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IP: epIP1,
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NodeName: nil,
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}, {
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IP: epIP2,
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NodeName: utilpointer.StringPtr(testHostname),
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}},
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Ports: []v1.EndpointPort{{
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Name: svcPortName.Port,
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Port: int32(svcPort),
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Protocol: v1.ProtocolTCP,
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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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proto := strings.ToLower(string(v1.ProtocolTCP))
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lbChain := string(serviceLBChainName(svcPortName.String(), proto))
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svcChain := string(servicePortChainName(svcPortName.String(), strings.ToLower(string(v1.ProtocolTCP))))
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kubeSvcRules := ipt.GetRules(string(kubeServicesChain))
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if !hasJump(kubeSvcRules, svcChain, svcExternalIPs, svcPort) {
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errorf(fmt.Sprintf("Failed to find jump to svc chain %v", svcChain), kubeSvcRules, t)
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}
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svcRules := ipt.GetRules(svcChain)
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if len(svcRules) != 4 {
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t.Errorf("expected svcChain %v to have 4 rules, got %v", svcChain, len(svcRules))
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}
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if !hasJump(svcRules, string(KubeMarkMasqChain), svcIP, svcPort) {
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errorf(fmt.Sprintf("Failed to find jump from %v to KUBE-MARK-MASQ chain", svcChain), svcRules, t)
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}
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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`
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if !strings.Contains(fp.iptablesData.String(), expectedExternalIPNonLocalTrafficMasqueradeRule) {
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errorf(fmt.Sprintf("Didn't find the masquerade rule for external-ip non-local traffic in svc chain %v", svcChain), svcRules, t)
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}
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lbRules := ipt.GetRules(lbChain)
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if len(lbRules) != 0 {
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t.Errorf("expected svclbChain %v to have 0 rules, got %v", lbChain, len(lbRules))
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}
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}
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func TestNodePortReject(t *testing.T) {
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ipt := iptablestest.NewFake()
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fp := NewFakeProxier(ipt, false)
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@ -2886,7 +2971,7 @@ COMMIT
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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-MARK-MASQ -j MARK --or-mark 0x4000
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-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
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-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
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-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
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-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment ns1/svc1 -m statistic --mode random --probability 0.3333333333 -j KUBE-SEP-3JOIVZTXZZRGORX4
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-A KUBE-SEP-3JOIVZTXZZRGORX4 -m comment --comment ns1/svc1 -s 10.0.1.1/32 -j KUBE-MARK-MASQ
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@ -2986,7 +3071,7 @@ COMMIT
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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-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
|
||||
@ -3309,7 +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
|
||||
@ -3375,7 +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