External connectivity test

test/e2e/windows/hybrid_network.go

+/*
+Copyright 2018 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package windows
+
+import (
+	"fmt"
+
+	v1 "k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/util/uuid"
+	"k8s.io/kubernetes/test/e2e/framework"
+	imageutils "k8s.io/kubernetes/test/utils/image"
+
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+)
+
+const (
+	linuxOS   = "linux"
+	windowsOS = "windows"
+)
+
+var (
+	windowsBusyBoximage = imageutils.GetE2EImage(imageutils.TestWebserver)
+	linuxBusyBoxImage   = "docker.io/library/nginx:1.15-alpine"
+)
+
+var _ = SIGDescribe("Hybrid cluster network", func() {
+	f := framework.NewDefaultFramework("hybrid-network")
+
+	BeforeEach(func() {
+		framework.SkipUnlessNodeOSDistroIs("windows")
+	})
+
+	Context("for all supported CNIs", func() {
+
+		It("should have stable external networking for linux and windows pods", func() {
+
+			By("creating a linux pod with external requests")
+			linuxPod := CreateTestPod(f, linuxBusyBoxImage, linuxOS)
+			cmd := []string{"/bin/sh", "-c", "nc -vz 8.8.8.8 53", "||", "nc -vz 8.8.4.4 53"}
+			checkExternal(f, linuxPod, linuxOS, cmd)
+
+			By("creating a windows pod with external requests")
+			windowsPod := CreateTestPod(f, windowsBusyBoximage, windowsOS)
+			cmd = []string{"powershell", "-command", "$r=invoke-webrequest www.google.com -usebasicparsing; echo $r.StatusCode"}
+			out, msg := checkExternal(f, windowsPod, windowsOS, cmd)
+			Expect(out).To(Equal("200"), msg)
+		})
+
+	})
+})
+
+func checkExternal(f *framework.Framework, podName string, os string, cmd []string]) (string, string) {
+	By(fmt.Sprintf("checking external connectivity of %s-container in %s pod", os, podName))
+	out, stderr, err := f.ExecCommandInContainerWithFullOutput(podName, os + "-container", cmd...)
+	msg := fmt.Sprintf("cmd: %v, stdout: %q, stderr: %q", cmd, out, stderr)
+	Expect(err).NotTo(HaveOccurred(), msg)
+	return out, msg
+}
+
+func CreateTestPod(f *framework.Framework, image string, os string) string {
+	ns := f.Namespace.Name
+	cs := f.ClientSet
+
+	podName := "pod-" + string(uuid.NewUUID())
+	pod := &v1.Pod{
+		TypeMeta: metav1.TypeMeta{
+			Kind:       "Pod",
+			APIVersion: "v1",
+		},
+		ObjectMeta: metav1.ObjectMeta{
+			Name: podName,
+		},
+		Spec: v1.PodSpec{
+			Containers: []v1.Container{
+				{
+					Name:  os + "-container",
+					Image: image,
+				},
+			},
+			NodeSelector: map[string]string{
+				"beta.kubernetes.io/os": os,
+			},
+		},
+	}
+	if os == linuxOS {
+		pod.Spec.Tolerations = []v1.Toleration{
+			{
+				Key:      "key",
+				Operator: v1.TolerationOpExists,
+				Effect:   v1.TaintEffectNoSchedule,
+			},
+		}
+	}
+	_, err := cs.CoreV1().Pods(ns).Create(pod)
+	framework.ExpectNoError(err)
+	framework.ExpectNoError(f.WaitForPodRunning(podName))
+	return podName
+}