9accb994df
Some tests are checking the network connectivity using gomega.Consistently, which will fail if any of the checks fails. This could lead to flakyness in some scenarios in which kube-proxy was supposed to apply Policies for Kubernetes services. We can instead wait for the network connectivity to work first using gomega.Eventually, after which we can check the consistency.
148 lines
4.4 KiB
Go
148 lines
4.4 KiB
Go
/*
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Copyright 2018 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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"fmt"
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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/util/uuid"
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"k8s.io/kubernetes/test/e2e/framework"
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e2eskipper "k8s.io/kubernetes/test/e2e/framework/skipper"
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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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const (
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linuxOS = "linux"
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windowsOS = "windows"
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)
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var (
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windowsBusyBoximage = imageutils.GetE2EImage(imageutils.Agnhost)
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linuxBusyBoxImage = imageutils.GetE2EImage(imageutils.Nginx)
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)
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var _ = SIGDescribe("Hybrid cluster network", func() {
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f := framework.NewDefaultFramework("hybrid-network")
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ginkgo.BeforeEach(func() {
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e2eskipper.SkipUnlessNodeOSDistroIs("windows")
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})
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ginkgo.Context("for all supported CNIs", func() {
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ginkgo.It("should have stable networking for Linux and Windows pods", func() {
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linuxPod := createTestPod(f, linuxBusyBoxImage, linuxOS)
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ginkgo.By("creating a linux pod and waiting for it to be running")
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linuxPod = f.PodClient().CreateSync(linuxPod)
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windowsPod := createTestPod(f, windowsBusyBoximage, windowsOS)
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windowsPod.Spec.Containers[0].Args = []string{"test-webserver"}
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ginkgo.By("creating a windows pod and waiting for it to be running")
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windowsPod = f.PodClient().CreateSync(windowsPod)
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ginkgo.By("verifying pod external connectivity to the internet")
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ginkgo.By("checking connectivity to 8.8.8.8 53 (google.com) from Linux")
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assertConsistentConnectivity(f, linuxPod.ObjectMeta.Name, linuxOS, linuxCheck("8.8.8.8", 53))
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ginkgo.By("checking connectivity to www.google.com from Windows")
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assertConsistentConnectivity(f, windowsPod.ObjectMeta.Name, windowsOS, windowsCheck("www.google.com"))
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ginkgo.By("verifying pod internal connectivity to the cluster dataplane")
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ginkgo.By("checking connectivity from Linux to Windows")
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assertConsistentConnectivity(f, linuxPod.ObjectMeta.Name, linuxOS, linuxCheck(windowsPod.Status.PodIP, 80))
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ginkgo.By("checking connectivity from Windows to Linux")
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assertConsistentConnectivity(f, windowsPod.ObjectMeta.Name, windowsOS, windowsCheck(linuxPod.Status.PodIP))
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})
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})
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})
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var (
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duration = "10s"
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pollInterval = "1s"
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timeoutSeconds = 10
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)
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func assertConsistentConnectivity(f *framework.Framework, podName string, os string, cmd []string) {
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connChecker := func() error {
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ginkgo.By(fmt.Sprintf("checking connectivity of %s-container in %s", os, podName))
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// TODO, we should be retrying this similar to what is done in DialFromNode, in the test/e2e/networking/networking.go tests
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_, _, err := f.ExecCommandInContainerWithFullOutput(podName, os+"-container", cmd...)
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return err
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}
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gomega.Eventually(connChecker, duration, pollInterval).ShouldNot(gomega.HaveOccurred())
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gomega.Consistently(connChecker, duration, pollInterval).ShouldNot(gomega.HaveOccurred())
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}
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func linuxCheck(address string, port int) []string {
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nc := fmt.Sprintf("nc -vz %s %v -w %v", address, port, timeoutSeconds)
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cmd := []string{"/bin/sh", "-c", nc}
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return cmd
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}
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func windowsCheck(address string) []string {
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curl := fmt.Sprintf("curl.exe %s --connect-timeout %v --fail", address, timeoutSeconds)
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cmd := []string{"cmd", "/c", curl}
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return cmd
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}
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func createTestPod(f *framework.Framework, image string, os string) *v1.Pod {
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containerName := fmt.Sprintf("%s-container", os)
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podName := "pod-" + string(uuid.NewUUID())
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pod := &v1.Pod{
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TypeMeta: metav1.TypeMeta{
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Kind: "Pod",
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APIVersion: "v1",
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},
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ObjectMeta: metav1.ObjectMeta{
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Name: podName,
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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: containerName,
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Image: image,
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Ports: []v1.ContainerPort{{ContainerPort: 80}},
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},
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},
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NodeSelector: map[string]string{
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"kubernetes.io/os": os,
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},
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},
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}
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if os == linuxOS {
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pod.Spec.Tolerations = []v1.Toleration{
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{
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Operator: v1.TolerationOpExists,
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Effect: v1.TaintEffectNoSchedule,
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},
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}
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}
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return pod
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}
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