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Merge pull request #126110 from chengjoey/docs/e2e-pod-traffic

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add some notes for e2e preserve source pod ip test
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Kubernetes Prow Robot 2024-07-16 09:20:57 -07:00 committed by GitHub
commit 7e1cfca8af
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1 changed files with 6 additions and 1 deletions
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7
test/e2e/network/service.go
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@ -986,6 +986,9 @@ var _ = common.SIGDescribe("Services", func() {
framework.ExpectNoError(err)
})
// NOTE: base on fundamental requirement of the kubernetes networking model(https://kubernetes.io/docs/concepts/services-networking/)
// pods can communicate with all other pods on any other node without NAT
// we should avoid masquerading the internal Pod traffic, detail see #126089
ginkgo.It("should preserve source pod IP for traffic thru service cluster IP [LinuxOnly]", func(ctx context.Context) {
// this test is creating a pod with HostNetwork=true, which is not supported on Windows.
e2eskipper.SkipIfNodeOSDistroIs("windows")
@ -1055,7 +1058,9 @@ var _ = common.SIGDescribe("Services", func() {
for _, pausePod := range pausePods.Items {
sourceIP, execPodIP := execSourceIPTest(pausePod, serviceAddress)
ginkgo.By("Verifying the preserved source ip")
gomega.Expect(sourceIP).To(gomega.Equal(execPodIP))
gomega.Expect(sourceIP).To(gomega.Equal(execPodIP),
"expected preserved source IP is %s, if not, please check whether the internal pod traffic is masqueraded",
sourceIP)
}
})