Add IPv6 option for e2e iPerf test

test/e2e/network/networking_perf.go

@@ -36,9 +36,8 @@ const (
 	smallClusterTimeout = 200 * time.Second
 )
 
-// Declared as Flakey since it has not been proven to run in parallel on small nodes or slow networks in CI
-// TODO jayunit100 : Retag this test according to semantics from #22401
-var _ = SIGDescribe("Networking IPerf [Experimental] [Slow] [Feature:Networking-Performance]", func() {
+// networkingIPerf test runs iperf on a container in either IPv4 or IPv6 mode.
+func networkingIPerfTest(isIPv6 bool) {
 
 	f := framework.NewDefaultFramework("network-perf")
 
@@ -49,6 +48,11 @@ var _ = SIGDescribe("Networking IPerf [Experimental] [Slow] [Feature:Networking-
 	numServer := 1
 	maxBandwidthBits := gceBandwidthBitsEstimate
 
+	familyStr := ""
+	if isIPv6 {
+		familyStr = "-V "
+	}
+
 	It(fmt.Sprintf("should transfer ~ 1GB onto the service endpoint %v servers (maximum of %v clients)", numServer, numClient), func() {
 		nodes := framework.GetReadySchedulableNodesOrDie(f.ClientSet)
 		totalPods := len(nodes.Items)
@@ -68,7 +72,7 @@ var _ = SIGDescribe("Networking IPerf [Experimental] [Slow] [Feature:Networking-
 						Args: []string{
 							"/bin/sh",
 							"-c",
-							"/usr/local/bin/iperf -s -p 8001 ",
+							"/usr/local/bin/iperf " + familyStr + "-s -p 8001 ",
 						},
 						Ports: []v1.ContainerPort{{ContainerPort: 8001}},
 					}},
@@ -96,7 +100,7 @@ var _ = SIGDescribe("Networking IPerf [Experimental] [Slow] [Feature:Networking-
 							Args: []string{
 								"/bin/sh",
 								"-c",
-								"/usr/local/bin/iperf -c service-for-" + appName + " -p 8002 --reportstyle C && sleep 5",
+								"/usr/local/bin/iperf " + familyStr + "-c service-for-" + appName + " -p 8002 --reportstyle C && sleep 5",
 							},
 						},
 					},
@@ -153,4 +157,16 @@ var _ = SIGDescribe("Networking IPerf [Experimental] [Slow] [Feature:Networking-
 			framework.Logf("%v had bandwidth %v.  Ratio to expected (%v) was %f", ipClient, bandwidth, expectedBandwidth, float64(bandwidth)/float64(expectedBandwidth))
 		}
 	})
+}
+
+// Declared as Flakey since it has not been proven to run in parallel on small nodes or slow networks in CI
+// TODO jayunit100 : Retag this test according to semantics from #22401
+var _ = SIGDescribe("Networking IPerf IPv4 [Experimental] [Feature:Networking-IPv4] [Slow] [Feature:Networking-Performance]", func() {
+	networkingIPerfTest(false)
+})
+
+// Declared as Flakey since it has not been proven to run in parallel on small nodes or slow networks in CI
+// TODO jayunit100 : Retag this test according to semantics from #22401
+var _ = SIGDescribe("Networking IPerf IPv6 [Experimental] [Feature:Networking-IPv6] [Slow] [Feature:Networking-Performance]", func() {
+	networkingIPerfTest(true)
 })