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DNS e2e tests differentiate between IP family

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The e2e DNS tests differentiate between IP family to
avoid false positives with dual stack clusters.
This commit is contained in:
Antonio Ojea 2019-08-27 12:57:40 +02:00
parent 766d79bbf5
commit 930a1321da
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GPG Key ID: E4833AA228D4E824
2 changed files with 45 additions and 27 deletions
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50
test/e2e/network/dns.go
View File

@ -49,8 +49,9 @@ var _ = SIGDescribe("DNS", func() {
namesToResolve := []string{
fmt.Sprintf("kubernetes.default.svc.%s", framework.TestContext.ClusterDNSDomain),
}
wheezyProbeCmd, wheezyFileNames := createProbeCommand(namesToResolve, nil, "", "wheezy", f.Namespace.Name, framework.TestContext.ClusterDNSDomain)
jessieProbeCmd, jessieFileNames := createProbeCommand(namesToResolve, nil, "", "jessie", f.Namespace.Name, framework.TestContext.ClusterDNSDomain)
// TODO: Validate both IPv4 and IPv6 families for dual-stack
wheezyProbeCmd, wheezyFileNames := createProbeCommand(namesToResolve, nil, "", "wheezy", f.Namespace.Name, framework.TestContext.ClusterDNSDomain, framework.ClusterIsIPv6())
jessieProbeCmd, jessieFileNames := createProbeCommand(namesToResolve, nil, "", "jessie", f.Namespace.Name, framework.TestContext.ClusterDNSDomain, framework.ClusterIsIPv6())
ginkgo.By("Running these commands on wheezy: " + wheezyProbeCmd + "\n")
ginkgo.By("Running these commands on jessie: " + jessieProbeCmd + "\n")
@ -70,8 +71,9 @@ var _ = SIGDescribe("DNS", func() {
namesToResolve = append(namesToResolve, "metadata")
}
wheezyProbeCmd, wheezyFileNames := createProbeCommand(namesToResolve, nil, "", "wheezy", f.Namespace.Name, framework.TestContext.ClusterDNSDomain)
jessieProbeCmd, jessieFileNames := createProbeCommand(namesToResolve, nil, "", "jessie", f.Namespace.Name, framework.TestContext.ClusterDNSDomain)
// TODO: Validate both IPv4 and IPv6 families for dual-stack
wheezyProbeCmd, wheezyFileNames := createProbeCommand(namesToResolve, nil, "", "wheezy", f.Namespace.Name, framework.TestContext.ClusterDNSDomain, framework.ClusterIsIPv6())
jessieProbeCmd, jessieFileNames := createProbeCommand(namesToResolve, nil, "", "jessie", f.Namespace.Name, framework.TestContext.ClusterDNSDomain, framework.ClusterIsIPv6())
ginkgo.By("Running these commands on wheezy: " + wheezyProbeCmd + "\n")
ginkgo.By("Running these commands on jessie: " + jessieProbeCmd + "\n")
@ -91,8 +93,9 @@ var _ = SIGDescribe("DNS", func() {
}
hostFQDN := fmt.Sprintf("%s.%s.%s.svc.%s", dnsTestPodHostName, dnsTestServiceName, f.Namespace.Name, framework.TestContext.ClusterDNSDomain)
hostEntries := []string{hostFQDN, dnsTestPodHostName}
wheezyProbeCmd, wheezyFileNames := createProbeCommand(namesToResolve, hostEntries, "", "wheezy", f.Namespace.Name, framework.TestContext.ClusterDNSDomain)
jessieProbeCmd, jessieFileNames := createProbeCommand(namesToResolve, hostEntries, "", "jessie", f.Namespace.Name, framework.TestContext.ClusterDNSDomain)
// TODO: Validate both IPv4 and IPv6 families for dual-stack
wheezyProbeCmd, wheezyFileNames := createProbeCommand(namesToResolve, hostEntries, "", "wheezy", f.Namespace.Name, framework.TestContext.ClusterDNSDomain, framework.ClusterIsIPv6())
jessieProbeCmd, jessieFileNames := createProbeCommand(namesToResolve, hostEntries, "", "jessie", f.Namespace.Name, framework.TestContext.ClusterDNSDomain, framework.ClusterIsIPv6())
ginkgo.By("Running these commands on wheezy: " + wheezyProbeCmd + "\n")
ginkgo.By("Running these commands on jessie: " + jessieProbeCmd + "\n")
@ -110,8 +113,9 @@ var _ = SIGDescribe("DNS", func() {
framework.ConformanceIt("should provide /etc/hosts entries for the cluster [LinuxOnly]", func() {
hostFQDN := fmt.Sprintf("%s.%s.%s.svc.%s", dnsTestPodHostName, dnsTestServiceName, f.Namespace.Name, framework.TestContext.ClusterDNSDomain)
hostEntries := []string{hostFQDN, dnsTestPodHostName}
wheezyProbeCmd, wheezyFileNames := createProbeCommand(nil, hostEntries, "", "wheezy", f.Namespace.Name, framework.TestContext.ClusterDNSDomain)
jessieProbeCmd, jessieFileNames := createProbeCommand(nil, hostEntries, "", "jessie", f.Namespace.Name, framework.TestContext.ClusterDNSDomain)
// TODO: Validate both IPv4 and IPv6 families for dual-stack
wheezyProbeCmd, wheezyFileNames := createProbeCommand(nil, hostEntries, "", "wheezy", f.Namespace.Name, framework.TestContext.ClusterDNSDomain, framework.ClusterIsIPv6())
jessieProbeCmd, jessieFileNames := createProbeCommand(nil, hostEntries, "", "jessie", f.Namespace.Name, framework.TestContext.ClusterDNSDomain, framework.ClusterIsIPv6())
ginkgo.By("Running these commands on wheezy: " + wheezyProbeCmd + "\n")
ginkgo.By("Running these commands on jessie: " + jessieProbeCmd + "\n")
@ -162,8 +166,9 @@ var _ = SIGDescribe("DNS", func() {
fmt.Sprintf("_http._tcp.%s.%s.svc.%s", regularService.Name, f.Namespace.Name, framework.TestContext.ClusterDNSDomain),
}
wheezyProbeCmd, wheezyFileNames := createProbeCommand(namesToResolve, nil, regularService.Spec.ClusterIP, "wheezy", f.Namespace.Name, framework.TestContext.ClusterDNSDomain)
jessieProbeCmd, jessieFileNames := createProbeCommand(namesToResolve, nil, regularService.Spec.ClusterIP, "jessie", f.Namespace.Name, framework.TestContext.ClusterDNSDomain)
// TODO: Validate both IPv4 and IPv6 families for dual-stack
wheezyProbeCmd, wheezyFileNames := createProbeCommand(namesToResolve, nil, regularService.Spec.ClusterIP, "wheezy", f.Namespace.Name, framework.TestContext.ClusterDNSDomain, framework.ClusterIsIPv6())
jessieProbeCmd, jessieFileNames := createProbeCommand(namesToResolve, nil, regularService.Spec.ClusterIP, "jessie", f.Namespace.Name, framework.TestContext.ClusterDNSDomain, framework.ClusterIsIPv6())
ginkgo.By("Running these commands on wheezy: " + wheezyProbeCmd + "\n")
ginkgo.By("Running these commands on jessie: " + jessieProbeCmd + "\n")
@ -212,8 +217,9 @@ var _ = SIGDescribe("DNS", func() {
fmt.Sprintf("_http._tcp.%s.%s.svc", regularService.Name, f.Namespace.Name),
}
wheezyProbeCmd, wheezyFileNames := createProbeCommand(namesToResolve, nil, regularService.Spec.ClusterIP, "wheezy", f.Namespace.Name, framework.TestContext.ClusterDNSDomain)
jessieProbeCmd, jessieFileNames := createProbeCommand(namesToResolve, nil, regularService.Spec.ClusterIP, "jessie", f.Namespace.Name, framework.TestContext.ClusterDNSDomain)
// TODO: Validate both IPv4 and IPv6 families for dual-stack
wheezyProbeCmd, wheezyFileNames := createProbeCommand(namesToResolve, nil, regularService.Spec.ClusterIP, "wheezy", f.Namespace.Name, framework.TestContext.ClusterDNSDomain, framework.ClusterIsIPv6())
jessieProbeCmd, jessieFileNames := createProbeCommand(namesToResolve, nil, regularService.Spec.ClusterIP, "jessie", f.Namespace.Name, framework.TestContext.ClusterDNSDomain, framework.ClusterIsIPv6())
ginkgo.By("Running these commands on wheezy: " + wheezyProbeCmd + "\n")
ginkgo.By("Running these commands on jessie: " + jessieProbeCmd + "\n")
@ -251,8 +257,9 @@ var _ = SIGDescribe("DNS", func() {
hostFQDN := fmt.Sprintf("%s.%s.%s.svc.%s", podHostname, serviceName, f.Namespace.Name, framework.TestContext.ClusterDNSDomain)
hostNames := []string{hostFQDN, podHostname}
wheezyProbeCmd, wheezyFileNames := createProbeCommand(nil, hostNames, "", "wheezy", f.Namespace.Name, framework.TestContext.ClusterDNSDomain)
jessieProbeCmd, jessieFileNames := createProbeCommand(nil, hostNames, "", "jessie", f.Namespace.Name, framework.TestContext.ClusterDNSDomain)
// TODO: Validate both IPv4 and IPv6 families for dual-stack
wheezyProbeCmd, wheezyFileNames := createProbeCommand(nil, hostNames, "", "wheezy", f.Namespace.Name, framework.TestContext.ClusterDNSDomain, framework.ClusterIsIPv6())
jessieProbeCmd, jessieFileNames := createProbeCommand(nil, hostNames, "", "jessie", f.Namespace.Name, framework.TestContext.ClusterDNSDomain, framework.ClusterIsIPv6())
ginkgo.By("Running these commands on wheezy: " + wheezyProbeCmd + "\n")
ginkgo.By("Running these commands on jessie: " + jessieProbeCmd + "\n")
@ -293,8 +300,9 @@ var _ = SIGDescribe("DNS", func() {
hostFQDN := fmt.Sprintf("%s.%s.%s.svc.%s", podHostname, serviceName, f.Namespace.Name, framework.TestContext.ClusterDNSDomain)
subdomain := fmt.Sprintf("%s.%s.svc.%s", serviceName, f.Namespace.Name, framework.TestContext.ClusterDNSDomain)
namesToResolve := []string{hostFQDN, subdomain}
wheezyProbeCmd, wheezyFileNames := createProbeCommand(namesToResolve, nil, "", "wheezy", f.Namespace.Name, framework.TestContext.ClusterDNSDomain)
jessieProbeCmd, jessieFileNames := createProbeCommand(namesToResolve, nil, "", "jessie", f.Namespace.Name, framework.TestContext.ClusterDNSDomain)
// TODO: Validate both IPv4 and IPv6 families for dual-stack
wheezyProbeCmd, wheezyFileNames := createProbeCommand(namesToResolve, nil, "", "wheezy", f.Namespace.Name, framework.TestContext.ClusterDNSDomain, framework.ClusterIsIPv6())
jessieProbeCmd, jessieFileNames := createProbeCommand(namesToResolve, nil, "", "jessie", f.Namespace.Name, framework.TestContext.ClusterDNSDomain, framework.ClusterIsIPv6())
ginkgo.By("Running these commands on wheezy: " + wheezyProbeCmd + "\n")
ginkgo.By("Running these commands on jessie: " + jessieProbeCmd + "\n")
@ -365,8 +373,14 @@ var _ = SIGDescribe("DNS", func() {
}
})
framework.ExpectNoError(err, "failed to change service type to ClusterIP for service: %s", serviceName)
wheezyProbeCmd, wheezyFileName = createTargetedProbeCommand(hostFQDN, "A", "wheezy")
jessieProbeCmd, jessieFileName = createTargetedProbeCommand(hostFQDN, "A", "jessie")
targetRecord := "A"
if framework.ClusterIsIPv6() {
targetRecord = "AAAA"
}
// TODO: For dual stack we can run from here two createTargetedProbeCommand()
// one looking for an A record and another one for an AAAA record
wheezyProbeCmd, wheezyFileName = createTargetedProbeCommand(hostFQDN, targetRecord, "wheezy")
jessieProbeCmd, jessieFileName = createTargetedProbeCommand(hostFQDN, targetRecord, "jessie")
ginkgo.By("Running these commands on wheezy: " + wheezyProbeCmd + "\n")
ginkgo.By("Running these commands on jessie: " + jessieProbeCmd + "\n")

22
test/e2e/network/dns_common.go
View File

@ -447,14 +447,18 @@ func createDNSPod(namespace, wheezyProbeCmd, jessieProbeCmd, podHostName, servic
return dnsPod
}
func createProbeCommand(namesToResolve []string, hostEntries []string, ptrLookupIP string, fileNamePrefix, namespace, dnsDomain string) (string, []string) {
func createProbeCommand(namesToResolve []string, hostEntries []string, ptrLookupIP string, fileNamePrefix, namespace, dnsDomain string, isIPv6 bool) (string, []string) {
fileNames := make([]string, 0, len(namesToResolve)*2)
probeCmd := "for i in `seq 1 600`; do "
dnsRecord := "A"
if isIPv6 {
dnsRecord = "AAAA"
}
for _, name := range namesToResolve {
// Resolve by TCP and UDP DNS. Use $$(...) because $(...) is
// expanded by kubernetes (though this won't expand so should
// remain a literal, safe > sorry).
lookup := fmt.Sprintf("%s A %s AAAA", name, name)
lookup := fmt.Sprintf("%s %s", name, dnsRecord)
if strings.HasPrefix(name, "_") {
lookup = fmt.Sprintf("%s SRV", name)
}
@ -475,13 +479,16 @@ func createProbeCommand(namesToResolve []string, hostEntries []string, ptrLookup
podARecByUDPFileName := fmt.Sprintf("%s_udp@PodARecord", fileNamePrefix)
podARecByTCPFileName := fmt.Sprintf("%s_tcp@PodARecord", fileNamePrefix)
if framework.TestContext.IPFamily == "ipv6" {
probeCmd += fmt.Sprintf(`podARec=$$(getent hosts $$(hostname | awk '{print $1}') | tr ":." "-" | awk '{print $$1".%s.pod.%s"}');`, namespace, dnsDomain)
// getent doesn't work properly on Windows hosts and hostname -i doesn't return an IPv6 address
// so we have to use a different command per IP family
if isIPv6 {
probeCmd += fmt.Sprintf(`podARec=$$(getent hosts $$(hostname -s) | tr ":." "-" | awk '{print $$1".%s.pod.%s"}');`, namespace, dnsDomain)
} else {
probeCmd += fmt.Sprintf(`podARec=$$(hostname -i| awk -F. '{print $$1"-"$$2"-"$$3"-"$$4".%s.pod.%s"}');`, namespace, dnsDomain)
}
probeCmd += fmt.Sprintf(`check="$$(dig +notcp +noall +answer +search $${podARec} A $${podARec} AAAA)" && test -n "$$check" && echo OK > /results/%s;`, podARecByUDPFileName)
probeCmd += fmt.Sprintf(`check="$$(dig +tcp +noall +answer +search $${podARec} A $${podARec} AAAA)" && test -n "$$check" && echo OK > /results/%s;`, podARecByTCPFileName)
probeCmd += fmt.Sprintf(`check="$$(dig +notcp +noall +answer +search $${podARec} %s)" && test -n "$$check" && echo OK > /results/%s;`, dnsRecord, podARecByUDPFileName)
probeCmd += fmt.Sprintf(`check="$$(dig +tcp +noall +answer +search $${podARec} %s)" && test -n "$$check" && echo OK > /results/%s;`, dnsRecord, podARecByTCPFileName)
fileNames = append(fileNames, podARecByUDPFileName)
fileNames = append(fileNames, podARecByTCPFileName)
@ -506,9 +513,6 @@ func createProbeCommand(namesToResolve []string, hostEntries []string, ptrLookup
func createTargetedProbeCommand(nameToResolve string, lookup string, fileNamePrefix string) (string, string) {
fileName := fmt.Sprintf("%s_udp@%s", fileNamePrefix, nameToResolve)
nameLookup := fmt.Sprintf("%s %s", nameToResolve, lookup)
if lookup == "A" {
nameLookup = fmt.Sprintf("%s A %s AAAA", nameToResolve, nameToResolve)
}
probeCmd := fmt.Sprintf("for i in `seq 1 30`; do dig +short %s > /results/%s; sleep 1; done", nameLookup, fileName)
return probeCmd, fileName
}