mirror of
https://github.com/k3s-io/kubernetes.git
synced 2025-07-24 20:24:09 +00:00
Change custom DNS test to use ipconfig instead of resolv.conf
This commit is contained in:
Lee Cattarin
Patrick Lang
parent
8858425a89
commit
d63c90e25f
@ -1,5 +1,5 @@
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/*
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Copyright 2015 The Kubernetes Authors.
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Copyright 2019 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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@ -17,64 +17,35 @@ limitations under the License.
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package windows
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import (
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"regexp"
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"strings"
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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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imageutils "k8s.io/kubernetes/test/utils/image"
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. "github.com/onsi/ginkgo"
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. "github.com/onsi/gomega"
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"github.com/onsi/ginkgo"
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"github.com/onsi/gomega"
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)
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const dnsTestPodHostName = "dns-querier-1"
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const dnsTestServiceName = "dns-test-service"
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var _ = SIGDescribe("DNS", func() {
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ginkgo.BeforeEach(func() {
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framework.SkipUnlessNodeOSDistroIs("windows")
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})
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f := framework.NewDefaultFramework("dns")
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/*It("should provide DNS for pods for Hostname and Subdomain", func() {
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// Create a test headless service.
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By("Creating a test headless service")
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testServiceSelector := map[string]string{
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"dns-test-hostname-attribute": "true",
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}
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serviceName := "dns-test-service-2"
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podHostname := "dns-querier-2"
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headlessService := framework.CreateServiceSpec(serviceName, "", true, testServiceSelector)
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_, err := f.ClientSet.CoreV1().Services(f.Namespace.Name).Create(headlessService)
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Expect(err).NotTo(HaveOccurred(), "failed to create headless service: %s", serviceName)
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defer func() {
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By("deleting the test headless service")
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defer GinkgoRecover()
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f.ClientSet.CoreV1().Services(f.Namespace.Name).Delete(headlessService.Name, nil)
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}()
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hostFQDN := fmt.Sprintf("%s.%s.%s.svc.%s", podHostname, serviceName, f.Namespace.Name, framework.TestContext.ClusterDNSDomain)
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hostNames := []string{hostFQDN, podHostname}
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namesToResolve := []string{hostFQDN}
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wheezyProbeCmd, wheezyFileNames := createProbeCommand(namesToResolve, hostNames, "", "wheezy", f.Namespace.Name, framework.TestContext.ClusterDNSDomain)
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jessieProbeCmd, jessieFileNames := createProbeCommand(namesToResolve, hostNames, "", "jessie", f.Namespace.Name, framework.TestContext.ClusterDNSDomain)
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By("Running these commands on wheezy: " + wheezyProbeCmd + "\n")
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By("Running these commands on jessie: " + jessieProbeCmd + "\n")
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// Run a pod which probes DNS and exposes the results by HTTP.
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By("creating a pod to probe DNS")
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pod1 := createDNSPod(f.Namespace.Name, wheezyProbeCmd, jessieProbeCmd, dnsTestPodHostName, dnsTestServiceName)
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pod1.ObjectMeta.Labels = testServiceSelector
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pod1.Spec.Hostname = podHostname
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pod1.Spec.Subdomain = serviceName
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validateDNSResults(f, pod1, append(wheezyFileNames, jessieFileNames...))
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})*/
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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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ginkgo.It("should support configurable pod DNS servers", func() {
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ginkgo.By("Preparing a test DNS service with injected DNS names...")
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testInjectedIP := "1.1.1.1"
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testSearchPath := "resolv.conf.local"
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By("Creating a pod with dnsPolicy=None and customized dnsConfig...")
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ginkgo.By("Creating a pod with dnsPolicy=None and customized dnsConfig...")
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testUtilsPod := generateDNSUtilsPod()
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testUtilsPod.Spec.DNSPolicy = v1.DNSNone
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testNdotsValue := "2"
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@ -89,7 +60,7 @@ var _ = SIGDescribe("DNS", func() {
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},
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}
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testUtilsPod, err := f.ClientSet.CoreV1().Pods(f.Namespace.Name).Create(testUtilsPod)
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Expect(err).NotTo(HaveOccurred(), "failed to create pod: %s", testUtilsPod.Name)
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framework.ExpectNoError(err)
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framework.Logf("Created pod %v", testUtilsPod)
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defer func() {
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framework.Logf("Deleting pod %s...", testUtilsPod.Name)
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@ -97,12 +68,11 @@ var _ = SIGDescribe("DNS", func() {
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framework.Failf("Failed to delete pod %s: %v", testUtilsPod.Name, err)
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}
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}()
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Expect(f.WaitForPodRunning(testUtilsPod.Name)).NotTo(HaveOccurred(), "failed to wait for pod %s to be running", testUtilsPod.Name)
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gomega.Expect(f.WaitForPodRunning(testUtilsPod.Name)).NotTo(gomega.HaveOccurred(), "failed to wait for pod %s to be running", testUtilsPod.Name)
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By("Verifying customized DNS option is configured on pod...")
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// TODO: Figure out a better way other than checking the actual resolv,conf file.
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cmd := []string{"cat", "/etc/resolv.conf"}
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stdout, stderr, err := f.ExecWithOptions(framework.ExecOptions{
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ginkgo.By("Verifying customized DNS option is configured on pod...")
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cmd := []string{"ipconfig", "/all"}
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stdout, _, err := f.ExecWithOptions(framework.ExecOptions{
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Command: cmd,
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Namespace: f.Namespace.Name,
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PodName: testUtilsPod.Name,
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@ -110,10 +80,40 @@ var _ = SIGDescribe("DNS", func() {
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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 examine resolv,conf file on pod, stdout: %v, stderr: %v, err: %v", stdout, stderr, err)
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if !strings.Contains(stdout, "ndots:2") {
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framework.Failf("customized DNS options not found in resolv.conf, got: %s", stdout)
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framework.ExpectNoError(err)
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framework.Logf("ipconfig /all:\n%s", stdout)
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dnsRegex, err := regexp.Compile(`DNS Servers[\s*.]*:(\s*[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3})+`)
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if dnsRegex.MatchString(stdout) {
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match := dnsRegex.FindString(stdout)
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if !strings.Contains(match, "ndots:2") {
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framework.Failf("customized DNS options not found in ipconfig /all, got: %s", match)
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}
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} else {
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framework.Failf("cannot find DNS server info in ipconfig /all output: \n%s", stdout)
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}
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// TODO: Add more test cases for other DNSPolicies.
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})
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})
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func generateDNSUtilsPod() *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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ObjectMeta: metav1.ObjectMeta{
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GenerateName: "e2e-dns-utils-",
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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: "util",
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Image: imageutils.GetE2EImage(imageutils.Dnsutils),
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Command: []string{"sleep", "10000"},
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},
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},
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},
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}
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}
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@ -1,628 +0,0 @@
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/*
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Copyright 2017 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 windows
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import (
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"context"
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"fmt"
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"strings"
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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/apimachinery/pkg/fields"
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"k8s.io/apimachinery/pkg/labels"
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"k8s.io/apimachinery/pkg/util/intstr"
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"k8s.io/apimachinery/pkg/util/uuid"
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"k8s.io/apimachinery/pkg/util/wait"
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clientset "k8s.io/client-go/kubernetes"
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"k8s.io/kubernetes/test/e2e/framework"
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imageutils "k8s.io/kubernetes/test/utils/image"
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. "github.com/onsi/ginkgo"
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. "github.com/onsi/gomega"
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)
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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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ns string
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name string
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labels []string
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dnsPod *v1.Pod
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utilPod *v1.Pod
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utilService *v1.Service
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dnsServerPod *v1.Pod
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cm *v1.ConfigMap
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}
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func newDnsTestCommon() dnsTestCommon {
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return dnsTestCommon{
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f: framework.NewDefaultFramework("dns-config-map"),
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ns: "kube-system",
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}
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}
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func (t *dnsTestCommon) init() {
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By("Finding a DNS pod")
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label := labels.SelectorFromSet(labels.Set(map[string]string{"k8s-app": "kube-dns"}))
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options := metav1.ListOptions{LabelSelector: label.String()}
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namespace := "kube-system"
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pods, err := t.f.ClientSet.CoreV1().Pods(namespace).List(options)
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Expect(err).NotTo(HaveOccurred(), "failed to list pods in namespace: %s", namespace)
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Expect(len(pods.Items)).Should(BeNumerically(">=", 1))
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t.dnsPod = &pods.Items[0]
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framework.Logf("Using DNS pod: %v", t.dnsPod.Name)
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if strings.Contains(t.dnsPod.Name, "coredns") {
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t.name = "coredns"
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} else {
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t.name = "kube-dns"
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}
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}
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func (t *dnsTestCommon) checkDNSRecord(name string, predicate func([]string) bool, timeout time.Duration) {
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t.checkDNSRecordFrom(name, predicate, "kube-dns", timeout)
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}
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func (t *dnsTestCommon) checkDNSRecordFrom(name string, predicate func([]string) bool, target string, timeout time.Duration) {
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var actual []string
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err := wait.PollImmediate(
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time.Duration(1)*time.Second,
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timeout,
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func() (bool, error) {
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actual = t.runDig(name, target)
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if predicate(actual) {
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return true, nil
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}
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return false, nil
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})
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if err != nil {
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framework.Failf("dig result did not match: %#v after %v",
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actual, timeout)
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}
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}
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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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switch target {
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case "coredns":
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cmd = append(cmd, "@"+t.dnsPod.Status.PodIP)
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case "kube-dns":
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cmd = append(cmd, "@"+t.dnsPod.Status.PodIP, "-p", "10053")
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case "ptr-record":
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cmd = append(cmd, "-x")
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case "cluster-dns":
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case "cluster-dns-ipv6":
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cmd = append(cmd, "AAAA")
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break
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default:
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panic(fmt.Errorf("invalid target: " + target))
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}
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cmd = append(cmd, dnsName)
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stdout, stderr, err := t.f.ExecWithOptions(framework.ExecOptions{
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Command: cmd,
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Namespace: t.f.Namespace.Name,
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PodName: t.utilPod.Name,
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ContainerName: "util",
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CaptureStdout: true,
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CaptureStderr: true,
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})
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framework.Logf("Running dig: %v, stdout: %q, stderr: %q, err: %v",
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cmd, stdout, stderr, err)
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if stdout == "" {
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return []string{}
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} else {
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return strings.Split(stdout, "\n")
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}
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}
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func (t *dnsTestCommon) setConfigMap(cm *v1.ConfigMap) {
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if t.cm != nil {
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t.cm = cm
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}
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cm.ObjectMeta.Namespace = t.ns
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cm.ObjectMeta.Name = t.name
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options := metav1.ListOptions{
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FieldSelector: fields.Set{
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"metadata.namespace": t.ns,
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"metadata.name": t.name,
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}.AsSelector().String(),
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}
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cmList, err := t.c.CoreV1().ConfigMaps(t.ns).List(options)
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Expect(err).NotTo(HaveOccurred(), "failed to list ConfigMaps in namespace: %s", t.ns)
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if len(cmList.Items) == 0 {
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By(fmt.Sprintf("Creating the ConfigMap (%s:%s) %+v", t.ns, t.name, *cm))
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_, err := t.c.CoreV1().ConfigMaps(t.ns).Create(cm)
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Expect(err).NotTo(HaveOccurred(), "failed to create ConfigMap (%s:%s) %+v", t.ns, t.name, *cm)
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} else {
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By(fmt.Sprintf("Updating the ConfigMap (%s:%s) to %+v", t.ns, t.name, *cm))
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_, err := t.c.CoreV1().ConfigMaps(t.ns).Update(cm)
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Expect(err).NotTo(HaveOccurred(), "failed to update ConfigMap (%s:%s) to %+v", t.ns, t.name, *cm)
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}
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}
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func (t *dnsTestCommon) fetchDNSConfigMapData() map[string]string {
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if t.name == "coredns" {
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pcm, err := t.c.CoreV1().ConfigMaps(metav1.NamespaceSystem).Get(t.name, metav1.GetOptions{})
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Expect(err).NotTo(HaveOccurred(), "failed to get DNS ConfigMap: %s", t.name)
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return pcm.Data
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}
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return nil
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}
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func (t *dnsTestCommon) restoreDNSConfigMap(configMapData map[string]string) {
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if t.name == "coredns" {
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t.setConfigMap(&v1.ConfigMap{Data: configMapData})
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t.deleteCoreDNSPods()
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} else {
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t.c.CoreV1().ConfigMaps(t.ns).Delete(t.name, nil)
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}
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}
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func (t *dnsTestCommon) deleteConfigMap() {
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By(fmt.Sprintf("Deleting the ConfigMap (%s:%s)", t.ns, t.name))
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t.cm = nil
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err := t.c.CoreV1().ConfigMaps(t.ns).Delete(t.name, nil)
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Expect(err).NotTo(HaveOccurred(), "failed to delete config map: %s", t.name)
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}
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func (t *dnsTestCommon) createUtilPodLabel(baseName string) {
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// Actual port # doesn't matter, just needs to exist.
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const servicePort = 10101
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t.utilPod = &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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Namespace: t.f.Namespace.Name,
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Labels: map[string]string{"app": baseName},
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GenerateName: baseName + "-",
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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: "util",
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Image: imageutils.GetE2EImage(imageutils.Dnsutils),
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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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},
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},
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},
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},
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}
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var err error
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t.utilPod, err = t.c.CoreV1().Pods(t.f.Namespace.Name).Create(t.utilPod)
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Expect(err).NotTo(HaveOccurred(), "failed to create pod: %v", t.utilPod)
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framework.Logf("Created pod %v", t.utilPod)
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Expect(t.f.WaitForPodRunning(t.utilPod.Name)).NotTo(HaveOccurred(), "pod failed to start running: %v", t.utilPod)
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t.utilService = &v1.Service{
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TypeMeta: metav1.TypeMeta{
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Kind: "Service",
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},
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ObjectMeta: metav1.ObjectMeta{
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Namespace: t.f.Namespace.Name,
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Name: baseName,
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},
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Spec: v1.ServiceSpec{
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Selector: map[string]string{"app": baseName},
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Ports: []v1.ServicePort{
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{
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Protocol: v1.ProtocolTCP,
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Port: servicePort,
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TargetPort: intstr.FromInt(servicePort),
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},
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},
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},
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}
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t.utilService, err = t.c.CoreV1().Services(t.f.Namespace.Name).Create(t.utilService)
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Expect(err).NotTo(HaveOccurred(), "failed to create service: %s/%s", t.f.Namespace.Name, t.utilService.ObjectMeta.Name)
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framework.Logf("Created service %v", t.utilService)
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}
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func (t *dnsTestCommon) deleteUtilPod() {
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podClient := t.c.CoreV1().Pods(t.f.Namespace.Name)
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if err := podClient.Delete(t.utilPod.Name, metav1.NewDeleteOptions(0)); err != nil {
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framework.Logf("Delete of pod %v/%v failed: %v",
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t.utilPod.Namespace, t.utilPod.Name, err)
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}
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}
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// deleteCoreDNSPods manually deletes the CoreDNS pods to apply the changes to the ConfigMap.
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func (t *dnsTestCommon) deleteCoreDNSPods() {
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label := labels.SelectorFromSet(labels.Set(map[string]string{"k8s-app": "kube-dns"}))
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options := metav1.ListOptions{LabelSelector: label.String()}
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pods, err := t.f.ClientSet.CoreV1().Pods("kube-system").List(options)
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podClient := t.c.CoreV1().Pods(metav1.NamespaceSystem)
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|
||||
for _, pod := range pods.Items {
|
||||
err = podClient.Delete(pod.Name, metav1.NewDeleteOptions(0))
|
||||
Expect(err).NotTo(HaveOccurred(), "failed to delete pod: %s", pod.Name)
|
||||
}
|
||||
}
|
||||
|
||||
func generateDNSServerPod(aRecords map[string]string) *v1.Pod {
|
||||
pod := &v1.Pod{
|
||||
TypeMeta: metav1.TypeMeta{
|
||||
Kind: "Pod",
|
||||
},
|
||||
ObjectMeta: metav1.ObjectMeta{
|
||||
GenerateName: "e2e-dns-configmap-dns-server-",
|
||||
},
|
||||
Spec: v1.PodSpec{
|
||||
Containers: []v1.Container{
|
||||
{
|
||||
Name: "dns",
|
||||
Image: imageutils.GetE2EImage(imageutils.Dnsutils),
|
||||
Command: []string{
|
||||
"powershell",
|
||||
"Start-Sleep",
|
||||
"1000",
|
||||
"/usr/sbin/dnsmasq",
|
||||
"-u", "root",
|
||||
"-k",
|
||||
"--log-facility", "-",
|
||||
"-q",
|
||||
},
|
||||
},
|
||||
},
|
||||
DNSPolicy: "Default",
|
||||
},
|
||||
}
|
||||
|
||||
for name, ip := range aRecords {
|
||||
pod.Spec.Containers[0].Command = append(
|
||||
pod.Spec.Containers[0].Command,
|
||||
fmt.Sprintf("-A/%v/%v", name, ip))
|
||||
}
|
||||
return pod
|
||||
}
|
||||
|
||||
func (t *dnsTestCommon) createDNSPodFromObj(pod *v1.Pod) {
|
||||
t.dnsServerPod = pod
|
||||
|
||||
var err error
|
||||
t.dnsServerPod, err = t.c.CoreV1().Pods(t.f.Namespace.Name).Create(t.dnsServerPod)
|
||||
Expect(err).NotTo(HaveOccurred(), "failed to create pod: %v", t.dnsServerPod)
|
||||
framework.Logf("Created pod %v", t.dnsServerPod)
|
||||
Expect(t.f.WaitForPodRunning(t.dnsServerPod.Name)).NotTo(HaveOccurred(), "pod failed to start running: %v", t.dnsServerPod)
|
||||
|
||||
t.dnsServerPod, err = t.c.CoreV1().Pods(t.f.Namespace.Name).Get(
|
||||
t.dnsServerPod.Name, metav1.GetOptions{})
|
||||
Expect(err).NotTo(HaveOccurred(), "failed to get pod: %s", t.dnsServerPod.Name)
|
||||
}
|
||||
|
||||
func (t *dnsTestCommon) createDNSServer(aRecords map[string]string) {
|
||||
t.createDNSPodFromObj(generateDNSServerPod(aRecords))
|
||||
}
|
||||
|
||||
func (t *dnsTestCommon) createDNSServerWithPtrRecord(isIPv6 bool) {
|
||||
pod := &v1.Pod{
|
||||
TypeMeta: metav1.TypeMeta{
|
||||
Kind: "Pod",
|
||||
},
|
||||
ObjectMeta: metav1.ObjectMeta{
|
||||
GenerateName: "e2e-dns-configmap-dns-server-",
|
||||
},
|
||||
Spec: v1.PodSpec{
|
||||
Containers: []v1.Container{
|
||||
{
|
||||
Name: "dns",
|
||||
Image: imageutils.GetE2EImage(imageutils.Dnsutils),
|
||||
Command: []string{
|
||||
"/usr/sbin/dnsmasq",
|
||||
"-u", "root",
|
||||
"-k",
|
||||
"--log-facility", "-",
|
||||
"-q",
|
||||
},
|
||||
},
|
||||
},
|
||||
DNSPolicy: "Default",
|
||||
},
|
||||
}
|
||||
|
||||
if isIPv6 {
|
||||
pod.Spec.Containers[0].Command = append(
|
||||
pod.Spec.Containers[0].Command,
|
||||
fmt.Sprintf("--host-record=my.test,2001:db8::29"))
|
||||
} else {
|
||||
pod.Spec.Containers[0].Command = append(
|
||||
pod.Spec.Containers[0].Command,
|
||||
fmt.Sprintf("--host-record=my.test,192.0.2.123"))
|
||||
}
|
||||
|
||||
t.createDNSPodFromObj(pod)
|
||||
}
|
||||
|
||||
func (t *dnsTestCommon) deleteDNSServerPod() {
|
||||
podClient := t.c.CoreV1().Pods(t.f.Namespace.Name)
|
||||
if err := podClient.Delete(t.dnsServerPod.Name, metav1.NewDeleteOptions(0)); err != nil {
|
||||
framework.Logf("Delete of pod %v/%v failed: %v",
|
||||
t.utilPod.Namespace, t.dnsServerPod.Name, err)
|
||||
}
|
||||
}
|
||||
|
||||
func createDNSPod(namespace, wheezyProbeCmd, jessieProbeCmd, podHostName, serviceName string) *v1.Pod {
|
||||
dnsPod := &v1.Pod{
|
||||
TypeMeta: metav1.TypeMeta{
|
||||
Kind: "Pod",
|
||||
APIVersion: "v1",
|
||||
},
|
||||
ObjectMeta: metav1.ObjectMeta{
|
||||
Name: "dns-test-" + string(uuid.NewUUID()),
|
||||
Namespace: namespace,
|
||||
},
|
||||
Spec: v1.PodSpec{
|
||||
Volumes: []v1.Volume{
|
||||
{
|
||||
Name: "results",
|
||||
VolumeSource: v1.VolumeSource{
|
||||
EmptyDir: &v1.EmptyDirVolumeSource{},
|
||||
},
|
||||
},
|
||||
},
|
||||
Containers: []v1.Container{
|
||||
// TODO: Consider scraping logs instead of running a webserver.
|
||||
{
|
||||
Name: "webserver",
|
||||
Image: imageutils.GetE2EImage(imageutils.TestWebserver),
|
||||
Ports: []v1.ContainerPort{
|
||||
{
|
||||
Name: "http",
|
||||
ContainerPort: 80,
|
||||
},
|
||||
},
|
||||
VolumeMounts: []v1.VolumeMount{
|
||||
{
|
||||
Name: "results",
|
||||
MountPath: "C:\\results",
|
||||
},
|
||||
},
|
||||
},
|
||||
{
|
||||
Name: "querier",
|
||||
Image: imageutils.GetE2EImage(imageutils.Dnsutils),
|
||||
Command: []string{"cmd", "/c", wheezyProbeCmd},
|
||||
VolumeMounts: []v1.VolumeMount{
|
||||
{
|
||||
Name: "results",
|
||||
MountPath: "C:\\results",
|
||||
},
|
||||
},
|
||||
},
|
||||
{
|
||||
Name: "jessie-querier",
|
||||
Image: imageutils.GetE2EImage(imageutils.JessieDnsutils),
|
||||
Command: []string{"cmd", "/c", jessieProbeCmd},
|
||||
VolumeMounts: []v1.VolumeMount{
|
||||
{
|
||||
Name: "results",
|
||||
MountPath: "C:\\results",
|
||||
},
|
||||
},
|
||||
},
|
||||
},
|
||||
},
|
||||
}
|
||||
|
||||
dnsPod.Spec.Hostname = podHostName
|
||||
dnsPod.Spec.Subdomain = serviceName
|
||||
|
||||
return dnsPod
|
||||
}
|
||||
|
||||
func createProbeCommand(namesToResolve []string, hostEntries []string, ptrLookupIP string, fileNamePrefix, namespace, dnsDomain string) (string, []string) {
|
||||
fileNames := make([]string, 0, len(namesToResolve)*2)
|
||||
probeCmd := "for i in `seq 1 600`; do "
|
||||
for _, name := range namesToResolve {
|
||||
// Resolve by TCP and UDP DNS. Use $$(...) because $(...) is
|
||||
// expanded by kubernetes (though this won't expand so should
|
||||
// remain a literal, safe > sorry).
|
||||
lookup := "A"
|
||||
if strings.HasPrefix(name, "_") {
|
||||
lookup = "SRV"
|
||||
}
|
||||
fileName := fmt.Sprintf("%s_udp@%s", fileNamePrefix, name)
|
||||
fileNames = append(fileNames, fileName)
|
||||
probeCmd += fmt.Sprintf(`check="$$(dig +notcp +noall +answer +search %s %s)" && test -n "$$check" && echo OK > C:\\results\\s;`, name, lookup, fileName)
|
||||
fileName = fmt.Sprintf("%s_tcp@%s", fileNamePrefix, name)
|
||||
fileNames = append(fileNames, fileName)
|
||||
probeCmd += fmt.Sprintf(`check="$$(dig +tcp +noall +answer +search %s %s)" && test -n "$$check" && echo OK > C:\\results\\%s;`, name, lookup, fileName)
|
||||
}
|
||||
|
||||
for _, name := range hostEntries {
|
||||
fileName := fmt.Sprintf("%s_hosts@%s", fileNamePrefix, name)
|
||||
fileNames = append(fileNames, fileName)
|
||||
probeCmd += fmt.Sprintf(`test -n "$$(getent hosts %s)" && echo OK > C:\\results\\%s;`, name, fileName)
|
||||
}
|
||||
|
||||
podARecByUDPFileName := fmt.Sprintf("%s_udp@PodARecord", fileNamePrefix)
|
||||
podARecByTCPFileName := fmt.Sprintf("%s_tcp@PodARecord", fileNamePrefix)
|
||||
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 $${podARec} A)" && test -n "$$check" && echo OK > C:\\results\\%s;`, podARecByUDPFileName)
|
||||
probeCmd += fmt.Sprintf(`check="$$(dig +tcp +noall +answer +search $${podARec} A)" && test -n "$$check" && echo OK > C:\\results\\%s;`, podARecByTCPFileName)
|
||||
fileNames = append(fileNames, podARecByUDPFileName)
|
||||
fileNames = append(fileNames, podARecByTCPFileName)
|
||||
|
||||
if len(ptrLookupIP) > 0 {
|
||||
ptrLookup := fmt.Sprintf("%s.in-addr.arpa.", strings.Join(reverseArray(strings.Split(ptrLookupIP, ".")), "."))
|
||||
ptrRecByUDPFileName := fmt.Sprintf("%s_udp@PTR", ptrLookupIP)
|
||||
ptrRecByTCPFileName := fmt.Sprintf("%s_tcp@PTR", ptrLookupIP)
|
||||
probeCmd += fmt.Sprintf(`check="$$(dig +notcp +noall +answer +search %s PTR)" && test -n "$$check" && echo OK > C:\\results\\%s;`, ptrLookup, ptrRecByUDPFileName)
|
||||
probeCmd += fmt.Sprintf(`check="$$(dig +tcp +noall +answer +search %s PTR)" && test -n "$$check" && echo OK > C:\\results\\%s;`, ptrLookup, ptrRecByTCPFileName)
|
||||
fileNames = append(fileNames, ptrRecByUDPFileName)
|
||||
fileNames = append(fileNames, ptrRecByTCPFileName)
|
||||
}
|
||||
|
||||
probeCmd += "sleep 1; done"
|
||||
return probeCmd, fileNames
|
||||
}
|
||||
|
||||
// createTargetedProbeCommand returns a command line that performs a DNS lookup for a specific record type
|
||||
func createTargetedProbeCommand(nameToResolve string, lookup string, fileNamePrefix string) (string, string) {
|
||||
fileName := fmt.Sprintf("%s_udp@%s", fileNamePrefix, nameToResolve)
|
||||
probeCmd := fmt.Sprintf("dig +short +tries=12 %s %s > C:\\results\\%s", nameToResolve, lookup, fileName)
|
||||
return probeCmd, fileName
|
||||
}
|
||||
|
||||
func assertFilesExist(fileNames []string, fileDir string, pod *v1.Pod, client clientset.Interface) {
|
||||
assertFilesContain(fileNames, fileDir, pod, client, false, "")
|
||||
}
|
||||
|
||||
func assertFilesContain(fileNames []string, fileDir string, pod *v1.Pod, client clientset.Interface, check bool, expected string) {
|
||||
var failed []string
|
||||
|
||||
framework.ExpectNoError(wait.PollImmediate(time.Second*5, time.Second*600, func() (bool, error) {
|
||||
failed = []string{}
|
||||
|
||||
ctx, cancel := context.WithTimeout(context.Background(), framework.SingleCallTimeout)
|
||||
defer cancel()
|
||||
|
||||
for _, fileName := range fileNames {
|
||||
contents, err := client.CoreV1().RESTClient().Get().
|
||||
Context(ctx).
|
||||
Namespace(pod.Namespace).
|
||||
Resource("pods").
|
||||
SubResource("proxy").
|
||||
Name(pod.Name).
|
||||
Suffix(fileDir, fileName).
|
||||
Do().Raw()
|
||||
|
||||
if err != nil {
|
||||
if ctx.Err() != nil {
|
||||
framework.Failf("Unable to read %s from pod %s/%s: %v", fileName, pod.Namespace, pod.Name, err)
|
||||
} else {
|
||||
framework.Logf("Unable to read %s from pod %s/%s: %v", fileName, pod.Namespace, pod.Name, err)
|
||||
}
|
||||
failed = append(failed, fileName)
|
||||
} else if check && strings.TrimSpace(string(contents)) != expected {
|
||||
framework.Logf("File %s from pod %s/%s contains '%s' instead of '%s'", fileName, pod.Namespace, pod.Name, string(contents), expected)
|
||||
failed = append(failed, fileName)
|
||||
}
|
||||
}
|
||||
if len(failed) == 0 {
|
||||
return true, nil
|
||||
}
|
||||
framework.Logf("Lookups using %s/%s failed for: %v\n", pod.Namespace, pod.Name, failed)
|
||||
return false, nil
|
||||
}))
|
||||
Expect(len(failed)).To(Equal(0))
|
||||
}
|
||||
|
||||
func validateDNSResults(f *framework.Framework, pod *v1.Pod, fileNames []string) {
|
||||
By("submitting the pod to kubernetes")
|
||||
podClient := f.ClientSet.CoreV1().Pods(f.Namespace.Name)
|
||||
defer func() {
|
||||
By("deleting the pod")
|
||||
defer GinkgoRecover()
|
||||
podClient.Delete(pod.Name, metav1.NewDeleteOptions(0))
|
||||
}()
|
||||
if _, err := podClient.Create(pod); err != nil {
|
||||
framework.Failf("Failed to create pod %s/%s: %v", pod.Namespace, pod.Name, err)
|
||||
}
|
||||
|
||||
framework.ExpectNoError(f.WaitForPodRunning(pod.Name))
|
||||
|
||||
By("retrieving the pod")
|
||||
pod, err := podClient.Get(pod.Name, metav1.GetOptions{})
|
||||
if err != nil {
|
||||
framework.Failf("Failed to get pod %s/%s: %v", pod.Namespace, pod.Name, err)
|
||||
}
|
||||
// Try to find results for each expected name.
|
||||
By("looking for the results for each expected name from probers")
|
||||
assertFilesExist(fileNames, "results", pod, f.ClientSet)
|
||||
|
||||
// TODO: probe from the host, too.
|
||||
|
||||
framework.Logf("DNS probes using %s/%s succeeded\n", pod.Namespace, pod.Name)
|
||||
}
|
||||
|
||||
func validateTargetedProbeOutput(f *framework.Framework, pod *v1.Pod, fileNames []string, value string) {
|
||||
By("submitting the pod to kubernetes")
|
||||
podClient := f.ClientSet.CoreV1().Pods(f.Namespace.Name)
|
||||
defer func() {
|
||||
By("deleting the pod")
|
||||
defer GinkgoRecover()
|
||||
podClient.Delete(pod.Name, metav1.NewDeleteOptions(0))
|
||||
}()
|
||||
if _, err := podClient.Create(pod); err != nil {
|
||||
framework.Failf("Failed to create pod %s/%s: %v", pod.Namespace, pod.Name, err)
|
||||
}
|
||||
|
||||
framework.ExpectNoError(f.WaitForPodRunning(pod.Name))
|
||||
|
||||
By("retrieving the pod")
|
||||
pod, err := podClient.Get(pod.Name, metav1.GetOptions{})
|
||||
if err != nil {
|
||||
framework.Failf("Failed to get pod %s/%s: %v", pod.Namespace, pod.Name, err)
|
||||
}
|
||||
// Try to find the expected value for each expected name.
|
||||
By("looking for the results for each expected name from probers")
|
||||
assertFilesContain(fileNames, "results", pod, f.ClientSet, true, value)
|
||||
|
||||
framework.Logf("DNS probes using %s succeeded\n", pod.Name)
|
||||
}
|
||||
|
||||
func reverseArray(arr []string) []string {
|
||||
for i := 0; i < len(arr)/2; i++ {
|
||||
j := len(arr) - i - 1
|
||||
arr[i], arr[j] = arr[j], arr[i]
|
||||
}
|
||||
return arr
|
||||
}
|
||||
|
||||
func generateDNSUtilsPod() *v1.Pod {
|
||||
return &v1.Pod{
|
||||
TypeMeta: metav1.TypeMeta{
|
||||
Kind: "Pod",
|
||||
},
|
||||
ObjectMeta: metav1.ObjectMeta{
|
||||
GenerateName: "e2e-dns-utils-",
|
||||
},
|
||||
Spec: v1.PodSpec{
|
||||
Containers: []v1.Container{
|
||||
{
|
||||
Name: "util",
|
||||
Image: imageutils.GetE2EImage(imageutils.Dnsutils),
|
||||
Command: []string{"sleep", "10000"},
|
||||
},
|
||||
},
|
||||
},
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user