347 lines
10 KiB
Go
347 lines
10 KiB
Go
/*
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Copyright 2015 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package network
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import (
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"context"
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"fmt"
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"time"
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v1 "k8s.io/api/core/v1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/kubernetes/test/e2e/framework"
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e2eservice "k8s.io/kubernetes/test/e2e/framework/service"
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"k8s.io/kubernetes/test/e2e/network/common"
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"github.com/onsi/ginkgo"
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)
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var (
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googleDNSHostname = "dns.google"
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// The ConfigMap update mechanism takes longer than the standard
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// wait.ForeverTestTimeout.
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moreForeverTestTimeout = 2 * 60 * time.Second
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)
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type dnsNameserverTest struct {
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dnsTestCommon
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}
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func (t *dnsNameserverTest) run(isIPv6 bool) {
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t.init()
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t.createUtilPodLabel("e2e-dns-configmap")
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defer t.deleteUtilPod()
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originalConfigMapData := t.fetchDNSConfigMapData()
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defer t.restoreDNSConfigMap(originalConfigMapData)
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if isIPv6 {
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t.createDNSServer(t.f.Namespace.Name, map[string]string{
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"abc.acme.local": "2606:4700:4700::1111",
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"def.acme.local": "2606:4700:4700::2222",
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"widget.local": "2606:4700:4700::3333",
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})
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} else {
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t.createDNSServer(t.f.Namespace.Name, map[string]string{
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"abc.acme.local": "1.1.1.1",
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"def.acme.local": "2.2.2.2",
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"widget.local": "3.3.3.3",
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})
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}
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defer t.deleteDNSServerPod()
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if t.name == "coredns" {
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t.setConfigMap(&v1.ConfigMap{Data: map[string]string{
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"Corefile": fmt.Sprintf(`.:53 {
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health
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ready
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kubernetes %v in-addr.arpa ip6.arpa {
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pods insecure
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fallthrough in-addr.arpa ip6.arpa
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ttl 30
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}
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forward . %v
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}
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acme.local:53 {
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forward . %v
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}`, framework.TestContext.ClusterDNSDomain, t.dnsServerPod.Status.PodIP, t.dnsServerPod.Status.PodIP),
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}})
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t.deleteCoreDNSPods()
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} else {
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t.setConfigMap(&v1.ConfigMap{Data: map[string]string{
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"stubDomains": fmt.Sprintf(`{"acme.local":["%v"]}`, t.dnsServerPod.Status.PodIP),
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"upstreamNameservers": fmt.Sprintf(`["%v"]`, t.dnsServerPod.Status.PodIP),
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}})
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}
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if isIPv6 {
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t.checkDNSRecordFrom(
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"abc.acme.local",
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func(actual []string) bool { return len(actual) == 1 && actual[0] == "2606:4700:4700::1111" },
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"cluster-dns-ipv6",
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moreForeverTestTimeout)
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t.checkDNSRecordFrom(
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"def.acme.local",
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func(actual []string) bool { return len(actual) == 1 && actual[0] == "2606:4700:4700::2222" },
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"cluster-dns-ipv6",
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moreForeverTestTimeout)
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t.checkDNSRecordFrom(
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"widget.local",
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func(actual []string) bool { return len(actual) == 1 && actual[0] == "2606:4700:4700::3333" },
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"cluster-dns-ipv6",
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moreForeverTestTimeout)
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} else {
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t.checkDNSRecordFrom(
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"abc.acme.local",
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func(actual []string) bool { return len(actual) == 1 && actual[0] == "1.1.1.1" },
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"cluster-dns",
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moreForeverTestTimeout)
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t.checkDNSRecordFrom(
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"def.acme.local",
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func(actual []string) bool { return len(actual) == 1 && actual[0] == "2.2.2.2" },
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"cluster-dns",
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moreForeverTestTimeout)
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t.checkDNSRecordFrom(
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"widget.local",
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func(actual []string) bool { return len(actual) == 1 && actual[0] == "3.3.3.3" },
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"cluster-dns",
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moreForeverTestTimeout)
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}
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t.restoreDNSConfigMap(originalConfigMapData)
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// Wait for the deleted ConfigMap to take effect, otherwise the
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// configuration can bleed into other tests.
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t.checkDNSRecordFrom(
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"abc.acme.local",
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func(actual []string) bool { return len(actual) == 0 },
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"cluster-dns",
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moreForeverTestTimeout)
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}
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type dnsPtrFwdTest struct {
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dnsTestCommon
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}
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func (t *dnsPtrFwdTest) run(isIPv6 bool) {
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t.init()
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t.createUtilPodLabel("e2e-dns-configmap")
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defer t.deleteUtilPod()
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originalConfigMapData := t.fetchDNSConfigMapData()
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defer t.restoreDNSConfigMap(originalConfigMapData)
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t.createDNSServerWithPtrRecord(t.f.Namespace.Name, isIPv6)
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defer t.deleteDNSServerPod()
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// Should still be able to lookup public nameserver without explicit upstream nameserver set.
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if isIPv6 {
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t.checkDNSRecordFrom(
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"2001:4860:4860::8888",
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func(actual []string) bool { return len(actual) == 1 && actual[0] == googleDNSHostname+"." },
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"ptr-record",
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moreForeverTestTimeout)
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} else {
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t.checkDNSRecordFrom(
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"8.8.8.8",
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func(actual []string) bool { return len(actual) == 1 && actual[0] == googleDNSHostname+"." },
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"ptr-record",
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moreForeverTestTimeout)
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}
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if t.name == "coredns" {
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t.setConfigMap(&v1.ConfigMap{Data: map[string]string{
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"Corefile": fmt.Sprintf(`.:53 {
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health
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ready
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kubernetes %v in-addr.arpa ip6.arpa {
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pods insecure
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fallthrough in-addr.arpa ip6.arpa
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ttl 30
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}
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forward . %v
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}`, framework.TestContext.ClusterDNSDomain, t.dnsServerPod.Status.PodIP),
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}})
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t.deleteCoreDNSPods()
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} else {
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t.setConfigMap(&v1.ConfigMap{Data: map[string]string{
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"upstreamNameservers": fmt.Sprintf(`["%v"]`, t.dnsServerPod.Status.PodIP),
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}})
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}
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if isIPv6 {
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t.checkDNSRecordFrom(
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"2001:db8::29",
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func(actual []string) bool { return len(actual) == 1 && actual[0] == "my.test." },
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"ptr-record",
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moreForeverTestTimeout)
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t.restoreDNSConfigMap(originalConfigMapData)
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t.checkDNSRecordFrom(
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"2001:db8::29",
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func(actual []string) bool { return len(actual) == 0 },
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"ptr-record",
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moreForeverTestTimeout)
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} else {
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t.checkDNSRecordFrom(
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"192.0.2.123",
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func(actual []string) bool { return len(actual) == 1 && actual[0] == "my.test." },
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"ptr-record",
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moreForeverTestTimeout)
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t.restoreDNSConfigMap(originalConfigMapData)
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t.checkDNSRecordFrom(
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"192.0.2.123",
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func(actual []string) bool { return len(actual) == 0 },
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"ptr-record",
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moreForeverTestTimeout)
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}
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}
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type dnsExternalNameTest struct {
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dnsTestCommon
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}
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func (t *dnsExternalNameTest) run(isIPv6 bool) {
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t.init()
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t.createUtilPodLabel("e2e-dns-configmap")
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defer t.deleteUtilPod()
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originalConfigMapData := t.fetchDNSConfigMapData()
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defer t.restoreDNSConfigMap(originalConfigMapData)
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fooHostname := "foo.example.com"
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if isIPv6 {
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t.createDNSServer(t.f.Namespace.Name, map[string]string{
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fooHostname: "2001:db8::29",
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})
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} else {
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t.createDNSServer(t.f.Namespace.Name, map[string]string{
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fooHostname: "192.0.2.123",
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})
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}
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defer t.deleteDNSServerPod()
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f := t.f
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serviceName := "dns-externalname-upstream-test"
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externalNameService := e2eservice.CreateServiceSpec(serviceName, googleDNSHostname, false, nil)
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if _, err := f.ClientSet.CoreV1().Services(f.Namespace.Name).Create(context.TODO(), externalNameService, metav1.CreateOptions{}); err != nil {
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ginkgo.Fail(fmt.Sprintf("ginkgo.Failed when creating service: %v", err))
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}
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serviceNameLocal := "dns-externalname-upstream-local"
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externalNameServiceLocal := e2eservice.CreateServiceSpec(serviceNameLocal, fooHostname, false, nil)
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if _, err := f.ClientSet.CoreV1().Services(f.Namespace.Name).Create(context.TODO(), externalNameServiceLocal, metav1.CreateOptions{}); err != nil {
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ginkgo.Fail(fmt.Sprintf("ginkgo.Failed when creating service: %v", err))
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}
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defer func() {
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ginkgo.By("deleting the test externalName service")
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defer ginkgo.GinkgoRecover()
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f.ClientSet.CoreV1().Services(f.Namespace.Name).Delete(context.TODO(), externalNameService.Name, metav1.DeleteOptions{})
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f.ClientSet.CoreV1().Services(f.Namespace.Name).Delete(context.TODO(), externalNameServiceLocal.Name, metav1.DeleteOptions{})
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}()
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if isIPv6 {
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t.checkDNSRecordFrom(
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fmt.Sprintf("%s.%s.svc.%s", serviceName, f.Namespace.Name, framework.TestContext.ClusterDNSDomain),
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func(actual []string) bool {
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return len(actual) >= 1 && actual[0] == googleDNSHostname+"."
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},
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"cluster-dns-ipv6",
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moreForeverTestTimeout)
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} else {
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t.checkDNSRecordFrom(
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fmt.Sprintf("%s.%s.svc.%s", serviceName, f.Namespace.Name, framework.TestContext.ClusterDNSDomain),
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func(actual []string) bool {
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return len(actual) >= 1 && actual[0] == googleDNSHostname+"."
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},
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"cluster-dns",
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moreForeverTestTimeout)
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}
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if t.name == "coredns" {
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t.setConfigMap(&v1.ConfigMap{Data: map[string]string{
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"Corefile": fmt.Sprintf(`.:53 {
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health
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ready
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kubernetes %v in-addr.arpa ip6.arpa {
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pods insecure
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fallthrough in-addr.arpa ip6.arpa
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ttl 30
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}
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forward . %v
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}`, framework.TestContext.ClusterDNSDomain, t.dnsServerPod.Status.PodIP),
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}})
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t.deleteCoreDNSPods()
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} else {
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t.setConfigMap(&v1.ConfigMap{Data: map[string]string{
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"upstreamNameservers": fmt.Sprintf(`["%v"]`, t.dnsServerPod.Status.PodIP),
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}})
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}
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if isIPv6 {
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t.checkDNSRecordFrom(
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fmt.Sprintf("%s.%s.svc.%s", serviceNameLocal, f.Namespace.Name, framework.TestContext.ClusterDNSDomain),
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func(actual []string) bool {
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return len(actual) >= 1 && actual[0] == fooHostname+"." && actual[1] == "2001:db8::29"
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},
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"cluster-dns-ipv6",
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moreForeverTestTimeout)
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} else {
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t.checkDNSRecordFrom(
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fmt.Sprintf("%s.%s.svc.%s", serviceNameLocal, f.Namespace.Name, framework.TestContext.ClusterDNSDomain),
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func(actual []string) bool {
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return len(actual) == 2 && actual[0] == fooHostname+"." && actual[1] == "192.0.2.123"
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},
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"cluster-dns",
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moreForeverTestTimeout)
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}
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t.restoreDNSConfigMap(originalConfigMapData)
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}
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var _ = common.SIGDescribe("DNS configMap nameserver", func() {
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ginkgo.Context("Change stubDomain", func() {
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nsTest := &dnsNameserverTest{dnsTestCommon: newDNSTestCommon()}
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ginkgo.It("should be able to change stubDomain configuration [Slow][Serial]", func() {
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nsTest.c = nsTest.f.ClientSet
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nsTest.run(framework.TestContext.ClusterIsIPv6())
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})
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})
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ginkgo.Context("Forward PTR lookup", func() {
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fwdTest := &dnsPtrFwdTest{dnsTestCommon: newDNSTestCommon()}
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ginkgo.It("should forward PTR records lookup to upstream nameserver [Slow][Serial]", func() {
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fwdTest.c = fwdTest.f.ClientSet
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fwdTest.run(framework.TestContext.ClusterIsIPv6())
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})
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})
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ginkgo.Context("Forward external name lookup", func() {
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externalNameTest := &dnsExternalNameTest{dnsTestCommon: newDNSTestCommon()}
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ginkgo.It("should forward externalname lookup to upstream nameserver [Slow][Serial]", func() {
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externalNameTest.c = externalNameTest.f.ClientSet
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externalNameTest.run(framework.TestContext.ClusterIsIPv6())
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})
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})
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})
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