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tests: Replaces dnsutils image used with agnhost (part 4)
Quite a few images are only used a few times in a few tests. Thus, the images are being centralized into the agnhost image, reducing the number of images that have to be pulled and used. This PR replaces the usage of the following images with agnhost: - dnsutils dnsmasq is a Linux specific binary. In order for the tests to also pass on Windows, CoreDNS should be used instead.
This commit is contained in:
Claudiu Belu
parent
f692f5cfcd
commit
c57f20b712
@ -460,10 +460,20 @@ var _ = SIGDescribe("DNS", func() {
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testSearchPath := "resolv.conf.local"
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testDNSNameFull := fmt.Sprintf("%s.%s", testDNSNameShort, testSearchPath)
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testServerPod := generateDNSServerPod(map[string]string{
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corednsConfig := generateCoreDNSConfigmap(f.Namespace.Name, map[string]string{
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testDNSNameFull: testInjectedIP,
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})
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testServerPod, err := f.ClientSet.CoreV1().Pods(f.Namespace.Name).Create(context.TODO(), testServerPod, metav1.CreateOptions{})
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corednsConfig, err := f.ClientSet.CoreV1().ConfigMaps(f.Namespace.Name).Create(context.TODO(), corednsConfig, metav1.CreateOptions{})
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framework.ExpectNoError(err, "unable to create test configMap %s", corednsConfig.Name)
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defer func() {
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framework.Logf("Deleting configmap %s...", corednsConfig.Name)
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err := f.ClientSet.CoreV1().ConfigMaps(f.Namespace.Name).Delete(context.TODO(), corednsConfig.Name, nil)
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framework.ExpectNoError(err, "Failed to delete configmap %s: %v", corednsConfig.Name)
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}()
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testServerPod := generateCoreDNSServerPod(corednsConfig)
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testServerPod, err = f.ClientSet.CoreV1().Pods(f.Namespace.Name).Create(context.TODO(), testServerPod, metav1.CreateOptions{})
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framework.ExpectNoError(err, "failed to create pod: %s", testServerPod.Name)
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framework.Logf("Created pod %v", testServerPod)
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defer func() {
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@ -528,7 +538,7 @@ var _ = SIGDescribe("DNS", func() {
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// This verifies both:
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// - Custom search path is appended.
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// - DNS query is sent to the specified server.
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cmd = []string{"/usr/bin/dig", "+short", "+search", testDNSNameShort}
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cmd = []string{"dig", "+short", "+search", testDNSNameShort}
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digFunc := func() (bool, error) {
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stdout, stderr, err := f.ExecWithOptions(framework.ExecOptions{
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Command: cmd,
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@ -19,6 +19,7 @@ package network
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import (
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"context"
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"fmt"
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"regexp"
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"strings"
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"time"
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@ -40,6 +41,9 @@ import (
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"github.com/onsi/gomega"
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)
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// Windows output can contain additional \r
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var newLineRegexp = regexp.MustCompile("\r?\n")
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type dnsTestCommon struct {
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f *framework.Framework
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c clientset.Interface
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@ -104,7 +108,7 @@ func (t *dnsTestCommon) checkDNSRecordFrom(name string, predicate func([]string)
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// runDig queries for `dnsName`. Returns a list of responses.
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func (t *dnsTestCommon) runDig(dnsName, target string) []string {
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cmd := []string{"/usr/bin/dig", "+short"}
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cmd := []string{"dig", "+short"}
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switch target {
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case "coredns":
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cmd = append(cmd, "@"+t.dnsPod.Status.PodIP)
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@ -135,7 +139,7 @@ func (t *dnsTestCommon) runDig(dnsName, target string) []string {
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if stdout == "" {
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return []string{}
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}
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return strings.Split(stdout, "\n")
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return newLineRegexp.Split(stdout, -1)
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}
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func (t *dnsTestCommon) setConfigMap(cm *v1.ConfigMap) {
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@ -208,7 +212,7 @@ func (t *dnsTestCommon) createUtilPodLabel(baseName string) {
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Containers: []v1.Container{
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{
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Name: "util",
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Image: imageutils.GetE2EImage(imageutils.Dnsutils),
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Image: imageutils.GetE2EImage(imageutils.Agnhost),
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Command: []string{"sleep", "10000"},
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Ports: []v1.ContainerPort{
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{ContainerPort: servicePort, Protocol: v1.ProtocolTCP},
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@ -274,8 +278,8 @@ func (t *dnsTestCommon) deleteCoreDNSPods() {
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}
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}
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func generateDNSServerPod(aRecords map[string]string) *v1.Pod {
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pod := &v1.Pod{
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func generateCoreDNSServerPod(corednsConfig *v1.ConfigMap) *v1.Pod {
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return &v1.Pod{
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TypeMeta: metav1.TypeMeta{
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Kind: "Pod",
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},
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@ -283,29 +287,61 @@ func generateDNSServerPod(aRecords map[string]string) *v1.Pod {
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GenerateName: "e2e-dns-configmap-dns-server-",
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},
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Spec: v1.PodSpec{
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Volumes: []v1.Volume{
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{
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Name: "coredns-config",
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VolumeSource: v1.VolumeSource{
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ConfigMap: &v1.ConfigMapVolumeSource{
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LocalObjectReference: v1.LocalObjectReference{
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Name: corednsConfig.Name,
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},
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},
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},
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},
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},
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Containers: []v1.Container{
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{
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Name: "dns",
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Image: imageutils.GetE2EImage(imageutils.Dnsutils),
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Image: imageutils.GetE2EImage(imageutils.Agnhost),
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Command: []string{
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"/usr/sbin/dnsmasq",
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"-u", "root",
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"-k",
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"--log-facility", "-",
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"-q",
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"/coredns",
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"-conf", "/etc/coredns/Corefile",
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},
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VolumeMounts: []v1.VolumeMount{
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{
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Name: "coredns-config",
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MountPath: "/etc/coredns",
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ReadOnly: true,
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},
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},
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},
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},
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DNSPolicy: "Default",
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},
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}
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}
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func generateCoreDNSConfigmap(namespaceName string, aRecords map[string]string) *v1.ConfigMap {
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entries := ""
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for name, ip := range aRecords {
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pod.Spec.Containers[0].Command = append(
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pod.Spec.Containers[0].Command,
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fmt.Sprintf("-A/%v/%v", name, ip))
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entries += fmt.Sprintf("\n\t\t%v %v", ip, name)
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}
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corefileData := fmt.Sprintf(`. {
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hosts {%s
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}
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log
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}`, entries)
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return &v1.ConfigMap{
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ObjectMeta: metav1.ObjectMeta{
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Namespace: namespaceName,
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GenerateName: "e2e-coredns-configmap-",
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},
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Data: map[string]string{
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"Corefile": corefileData,
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},
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}
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return pod
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}
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func (t *dnsTestCommon) createDNSPodFromObj(pod *v1.Pod) {
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@ -322,47 +358,26 @@ func (t *dnsTestCommon) createDNSPodFromObj(pod *v1.Pod) {
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framework.ExpectNoError(err, "failed to get pod: %s", t.dnsServerPod.Name)
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}
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func (t *dnsTestCommon) createDNSServer(aRecords map[string]string) {
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t.createDNSPodFromObj(generateDNSServerPod(aRecords))
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func (t *dnsTestCommon) createDNSServer(namespace string, aRecords map[string]string) {
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corednsConfig := generateCoreDNSConfigmap(namespace, aRecords)
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corednsConfig, err := t.c.CoreV1().ConfigMaps(namespace).Create(context.TODO(), corednsConfig, metav1.CreateOptions{})
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if err != nil {
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framework.Failf("unable to create test configMap %s: %v", corednsConfig.Name, err)
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}
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t.createDNSPodFromObj(generateCoreDNSServerPod(corednsConfig))
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}
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func (t *dnsTestCommon) createDNSServerWithPtrRecord(isIPv6 bool) {
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pod := &v1.Pod{
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TypeMeta: metav1.TypeMeta{
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Kind: "Pod",
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},
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ObjectMeta: metav1.ObjectMeta{
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GenerateName: "e2e-dns-configmap-dns-server-",
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},
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Spec: v1.PodSpec{
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Containers: []v1.Container{
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{
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Name: "dns",
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Image: imageutils.GetE2EImage(imageutils.Dnsutils),
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Command: []string{
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"/usr/sbin/dnsmasq",
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"-u", "root",
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"-k",
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"--log-facility", "-",
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"-q",
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},
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},
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},
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DNSPolicy: "Default",
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},
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}
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func (t *dnsTestCommon) createDNSServerWithPtrRecord(namespace string, isIPv6 bool) {
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// NOTE: PTR records are generated automatically by CoreDNS. So, if we're creating A records, we're
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// going to also have PTR records. See: https://coredns.io/plugins/hosts/
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var aRecords map[string]string
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if isIPv6 {
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pod.Spec.Containers[0].Command = append(
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pod.Spec.Containers[0].Command,
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fmt.Sprintf("--host-record=my.test,2001:db8::29"))
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aRecords = map[string]string{"my.test": "2001:db8::29"}
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} else {
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pod.Spec.Containers[0].Command = append(
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pod.Spec.Containers[0].Command,
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fmt.Sprintf("--host-record=my.test,192.0.2.123"))
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aRecords = map[string]string{"my.test": "192.0.2.123"}
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}
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t.createDNSPodFromObj(pod)
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t.createDNSServer(namespace, aRecords)
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}
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func (t *dnsTestCommon) deleteDNSServerPod() {
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@ -413,7 +428,7 @@ func createDNSPod(namespace, wheezyProbeCmd, jessieProbeCmd, podHostName, servic
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},
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{
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Name: "querier",
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Image: imageutils.GetE2EImage(imageutils.Dnsutils),
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Image: imageutils.GetE2EImage(imageutils.Agnhost),
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Command: []string{"sh", "-c", wheezyProbeCmd},
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VolumeMounts: []v1.VolumeMount{
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{
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@ -622,7 +637,7 @@ func generateDNSUtilsPod() *v1.Pod {
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Containers: []v1.Container{
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{
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Name: "util",
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Image: imageutils.GetE2EImage(imageutils.Dnsutils),
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Image: imageutils.GetE2EImage(imageutils.Agnhost),
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Command: []string{"sleep", "10000"},
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},
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},
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@ -221,13 +221,13 @@ func (t *dnsNameserverTest) run(isIPv6 bool) {
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defer t.restoreDNSConfigMap(originalConfigMapData)
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if isIPv6 {
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t.createDNSServer(map[string]string{
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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(map[string]string{
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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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@ -317,7 +317,7 @@ func (t *dnsPtrFwdTest) run(isIPv6 bool) {
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originalConfigMapData := t.fetchDNSConfigMapData()
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defer t.restoreDNSConfigMap(originalConfigMapData)
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t.createDNSServerWithPtrRecord(isIPv6)
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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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@ -401,11 +401,11 @@ func (t *dnsExternalNameTest) run(isIPv6 bool) {
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fooHostname := "foo.example.com"
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if isIPv6 {
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t.createDNSServer(map[string]string{
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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(map[string]string{
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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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@ -102,7 +102,7 @@ func generateDNSUtilsPod() *v1.Pod {
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Containers: []v1.Container{
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{
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Name: "util",
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Image: imageutils.GetE2EImage(imageutils.Dnsutils),
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Image: imageutils.GetE2EImage(imageutils.Agnhost),
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Command: []string{"sleep", "10000"},
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},
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},
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@ -70,6 +70,7 @@ func initReg() RegistryList {
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DockerLibraryRegistry: "docker.io/library",
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DockerGluster: "docker.io/gluster",
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E2eRegistry: "gcr.io/kubernetes-e2e-test-images",
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// TODO: After the domain flip, this should instead be k8s.gcr.io/k8s-artifacts-prod/e2e-test-images
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PromoterE2eRegistry: "us.gcr.io/k8s-artifacts-prod/e2e-test-images",
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InvalidRegistry: "invalid.com/invalid",
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GcRegistry: "k8s.gcr.io",
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@ -139,8 +140,6 @@ const (
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CudaVectorAdd
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// CudaVectorAdd2 image
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CudaVectorAdd2
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// Dnsutils image
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Dnsutils
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// EchoServer image
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EchoServer
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// Etcd image
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@ -216,7 +215,6 @@ func initImageConfigs() map[int]Config {
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configs[CheckMetadataConcealment] = Config{e2eRegistry, "metadata-concealment", "1.2"}
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configs[CudaVectorAdd] = Config{e2eRegistry, "cuda-vector-add", "1.0"}
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configs[CudaVectorAdd2] = Config{e2eRegistry, "cuda-vector-add", "2.0"}
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configs[Dnsutils] = Config{e2eRegistry, "dnsutils", "1.1"}
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configs[EchoServer] = Config{e2eRegistry, "echoserver", "2.2"}
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configs[Etcd] = Config{gcRegistry, "etcd", "3.4.3"}
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configs[GlusterDynamicProvisioner] = Config{dockerGluster, "glusterdynamic-provisioner", "v1.0"}
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