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Merge pull request #9144 from GoogleCloudPlatform/revert-8881-services
Revert "Add a test for the service load balancer."
This commit is contained in:
Brian Grant
commit
a6d68bd76d
@ -1,203 +0,0 @@
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/*
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Copyright 2015 The Kubernetes Authors All rights reserved.
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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 e2e
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import (
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"bufio"
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"fmt"
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"strconv"
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"strings"
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"time"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/client"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/fields"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/kubectl"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/labels"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/util"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/util/wait"
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. "github.com/onsi/ginkgo"
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)
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func testAffinity(c *client.Client, ns string, svc *api.Service, expectedHosts int) {
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name := "server"
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replicas := 3
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// This is the server that will serve traffic, including the hostname.
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rc := &api.ReplicationController{
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ObjectMeta: api.ObjectMeta{
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Name: name,
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},
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Spec: api.ReplicationControllerSpec{
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Replicas: replicas,
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Selector: svc.Spec.Selector,
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Template: &api.PodTemplateSpec{
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ObjectMeta: api.ObjectMeta{
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Labels: svc.Spec.Selector,
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},
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Spec: api.PodSpec{
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Containers: []api.Container{
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{
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Name: name,
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Image: "gcr.io/google_containers/nettest:1.3",
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Ports: []api.ContainerPort{{ContainerPort: 8080}},
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},
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},
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},
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},
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},
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}
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By(fmt.Sprintf("Creating rc %s in namespace %s", rc.Name, ns))
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_, err := c.ReplicationControllers(ns).Create(rc)
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expectNoError(err, fmt.Sprintf("creating rc %s", rc.Name))
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defer func() {
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// Resize the replication controller to zero to get rid of pods.
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By("Cleaning up the replication controller")
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rcReaper, err := kubectl.ReaperFor("ReplicationController", c)
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if err != nil {
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Logf("Failed to cleanup replication controller %v: %v.", rc.Name, err)
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}
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if _, err = rcReaper.Stop(ns, rc.Name, nil); err != nil {
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Logf("Failed to stop replication controller %v: %v.", rc.Name, err)
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}
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}()
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selector := labels.SelectorFromSet(rc.Spec.Selector)
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By("Waiting for replicas to be created.")
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err = wait.Poll(time.Second*5, time.Second*60, func() (bool, error) {
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list, err := c.Pods(ns).List(selector, fields.Everything())
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if err != nil {
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fmt.Printf("unexpected error listing pods: %v", err)
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return false, nil
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}
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running := 0
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for _, pod := range list.Items {
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if pod.Status.Phase == api.PodRunning {
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running = running + 1
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}
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}
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return running == rc.Spec.Replicas, nil
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})
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expectNoError(err, "waiting for replicas to start running")
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By("Creating service for replicas")
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defer func() {
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err := c.Services(ns).Delete(svc.Name)
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expectNoError(err, "deleting service")
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}()
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_, err = c.Services(ns).Create(svc)
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expectNoError(err, "creating service")
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// This pod repeatedly curls the replicated server via the service, and logs the output.
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testPod := &api.Pod{
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ObjectMeta: api.ObjectMeta{
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Name: "tester",
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},
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Spec: api.PodSpec{
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Containers: []api.Container{
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{
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Name: "tester",
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Image: "busybox",
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Command: []string{"sh", "-c", "while true; do wget -qO- http://service:8080/read; sleep 1; done"},
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},
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},
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},
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}
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By(fmt.Sprintf("Creating pod %s in namespace %s", testPod.Name, ns))
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_, err = c.Pods(ns).Create(testPod)
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expectNoError(err, fmt.Sprintf("creating pod %s", testPod.Name))
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// At the end of the test, clean up by removing the pod.
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defer func() {
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By("Deleting the tester pod")
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c.Pods(ns).Delete(testPod.Name, nil)
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}()
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err = waitForPodRunningInNamespace(c, testPod.Name, ns)
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expectNoError(err, "waiting for tester pod to start")
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// Wait for us to accumulate a bunch of logs.
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// Collect the set of hosts that we've been connected to by the load balancer.
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hostsSeen := util.StringSet{}
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// Wait a maximum of 60 seconds
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for i := 0; i < 6; i++ {
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time.Sleep(10 * time.Second)
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// Grab the log files for the pod
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readCloser, err := c.RESTClient.Get().
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Namespace(ns).
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Name(testPod.Name).
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Resource("pods").
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SubResource("log").
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Param("follow", strconv.FormatBool(false)).
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Param("container", "tester").
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Param("previous", strconv.FormatBool(false)).
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Stream()
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expectNoError(err, "getting logs data")
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defer readCloser.Close()
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scanner := bufio.NewScanner(readCloser)
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hostCount := 0
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for scanner.Scan() {
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line := scanner.Text()
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if strings.Contains(line, "Hostname") {
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parts := strings.Split(line, ":")
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hostsSeen.Insert(parts[1])
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hostCount++
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}
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}
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// If we've accumulated enough data, break early.
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if hostCount > 2*expectedHosts {
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break
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}
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}
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// Validate
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if hostsSeen.Len() != expectedHosts {
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Failf("Expected only %d host(s), saw: %v", expectedHosts, hostsSeen.List())
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}
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}
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var _ = Describe("Affinity", func() {
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f := NewFramework("affinity")
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serviceName := "service"
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svc := &api.Service{
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ObjectMeta: api.ObjectMeta{
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Name: serviceName,
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},
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Spec: api.ServiceSpec{
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Selector: map[string]string{
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"name": "hostServer",
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},
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Ports: []api.ServicePort{{
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Port: 8080,
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TargetPort: util.NewIntOrStringFromInt(8080),
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}},
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},
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}
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It("should call multiple hosts", func() {
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testAffinity(f.Client, f.Namespace.Name, svc, 3)
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})
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svc.Spec.SessionAffinity = api.ServiceAffinityClientIP
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It("should have affinity in balancing", func() {
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testAffinity(f.Client, f.Namespace.Name, svc, 1)
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})
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})
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