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Merge pull request #76508 from bclau/tests/agnhost-custom-dns-test
tests: Adds configurable pod DNS nameservers and search list test
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commit
eacae8540a
@ -4865,6 +4865,25 @@ func (f *Framework) NewTestPod(name string, requests v1.ResourceList, limits v1.
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}
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}
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}
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}
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// NewAgnhostPod returns a pod that uses the agnhost image. The image's binary supports various subcommands
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// that behave the same, no matter the underlying OS.
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func (f *Framework) NewAgnhostPod(name string, args ...string) *v1.Pod {
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return &v1.Pod{
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ObjectMeta: metav1.ObjectMeta{
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Name: name,
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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: "agnhost",
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Image: imageutils.GetE2EImage(imageutils.Agnhost),
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Args: args,
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},
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},
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},
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}
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}
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// CreateEmptyFileOnPod creates empty file at given path on the pod.
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// CreateEmptyFileOnPod creates empty file at given path on the pod.
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func CreateEmptyFileOnPod(namespace string, podName string, filePath string) error {
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func CreateEmptyFileOnPod(namespace string, podName string, filePath string) error {
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_, err := RunKubectl("exec", fmt.Sprintf("--namespace=%s", namespace), podName, "--", "/bin/sh", "-c", fmt.Sprintf("touch %s", filePath))
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_, err := RunKubectl("exec", fmt.Sprintf("--namespace=%s", namespace), podName, "--", "/bin/sh", "-c", fmt.Sprintf("touch %s", filePath))
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@ -362,6 +362,54 @@ var _ = SIGDescribe("DNS", func() {
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validateTargetedProbeOutput(f, pod3, []string{wheezyFileName, jessieFileName}, svc.Spec.ClusterIP)
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validateTargetedProbeOutput(f, pod3, []string{wheezyFileName, jessieFileName}, svc.Spec.ClusterIP)
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})
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})
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It("should support configurable pod DNS nameservers", func() {
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By("Creating a pod with dnsPolicy=None and customized dnsConfig...")
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testServerIP := "1.1.1.1"
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testSearchPath := "resolv.conf.local"
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testAgnhostPod := f.NewAgnhostPod(f.Namespace.Name, "pause")
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testAgnhostPod.Spec.DNSPolicy = v1.DNSNone
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testAgnhostPod.Spec.DNSConfig = &v1.PodDNSConfig{
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Nameservers: []string{testServerIP},
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Searches: []string{testSearchPath},
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}
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testAgnhostPod, err := f.ClientSet.CoreV1().Pods(f.Namespace.Name).Create(testAgnhostPod)
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Expect(err).NotTo(HaveOccurred(), "failed to create pod: %s", testAgnhostPod.Name)
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framework.Logf("Created pod %v", testAgnhostPod)
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defer func() {
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framework.Logf("Deleting pod %s...", testAgnhostPod.Name)
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if err := f.ClientSet.CoreV1().Pods(f.Namespace.Name).Delete(testAgnhostPod.Name, metav1.NewDeleteOptions(0)); err != nil {
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framework.Failf("Failed to delete pod %s: %v", testAgnhostPod.Name, err)
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}
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}()
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Expect(f.WaitForPodRunning(testAgnhostPod.Name)).NotTo(HaveOccurred(), "failed to wait for pod %s to be running", testAgnhostPod.Name)
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runCommand := func(arg string) string {
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cmd := []string{"/agnhost", arg}
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stdout, stderr, err := f.ExecWithOptions(framework.ExecOptions{
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Command: cmd,
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Namespace: f.Namespace.Name,
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PodName: testAgnhostPod.Name,
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ContainerName: "agnhost",
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CaptureStdout: true,
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CaptureStderr: true,
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})
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Expect(err).NotTo(HaveOccurred(), "failed to run command '/agnhost %s' on pod, stdout: %v, stderr: %v, err: %v", arg, stdout, stderr, err)
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return stdout
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}
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By("Verifying customized DNS suffix list is configured on pod...")
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stdout := runCommand("dns-suffix")
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if !strings.Contains(stdout, testSearchPath) {
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framework.Failf("customized DNS suffix list not found configured in pod, expected to contain: %s, got: %s", testSearchPath, stdout)
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}
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By("Verifying customized DNS server is configured on pod...")
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stdout = runCommand("dns-server-list")
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if !strings.Contains(stdout, testServerIP) {
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framework.Failf("customized DNS server not found in configured in pod, expected to contain: %s, got: %s", testServerIP, stdout)
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}
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})
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It("should support configurable pod resolv.conf", func() {
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It("should support configurable pod resolv.conf", func() {
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By("Preparing a test DNS service with injected DNS names...")
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By("Preparing a test DNS service with injected DNS names...")
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testInjectedIP := "1.1.1.1"
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testInjectedIP := "1.1.1.1"
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