496a18febc
This script checks coding style for test code. It is useful to enforce developers to use framework methods for keeping readable test code for example.
268 lines
8.5 KiB
Go
268 lines
8.5 KiB
Go
/*
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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 scheduling
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import (
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"fmt"
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"strconv"
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"github.com/onsi/ginkgo"
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"github.com/onsi/gomega"
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compute "google.golang.org/api/compute/v1"
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"k8s.io/api/core/v1"
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"k8s.io/apimachinery/pkg/api/resource"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/util/sets"
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"k8s.io/apimachinery/pkg/util/uuid"
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"k8s.io/kubernetes/test/e2e/framework"
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e2elog "k8s.io/kubernetes/test/e2e/framework/log"
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"k8s.io/kubernetes/test/e2e/framework/providers/gce"
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)
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var _ = SIGDescribe("Multi-AZ Cluster Volumes [sig-storage]", func() {
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f := framework.NewDefaultFramework("multi-az")
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var zoneCount int
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var err error
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image := framework.ServeHostnameImage
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ginkgo.BeforeEach(func() {
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framework.SkipUnlessProviderIs("gce", "gke")
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if zoneCount <= 0 {
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zoneCount, err = getZoneCount(f.ClientSet)
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framework.ExpectNoError(err)
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}
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ginkgo.By(fmt.Sprintf("Checking for multi-zone cluster. Zone count = %d", zoneCount))
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msg := fmt.Sprintf("Zone count is %d, only run for multi-zone clusters, skipping test", zoneCount)
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framework.SkipUnlessAtLeast(zoneCount, 2, msg)
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// TODO: SkipUnlessDefaultScheduler() // Non-default schedulers might not spread
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})
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ginkgo.It("should schedule pods in the same zones as statically provisioned PVs", func() {
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PodsUseStaticPVsOrFail(f, (2*zoneCount)+1, image)
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})
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ginkgo.It("should only be allowed to provision PDs in zones where nodes exist", func() {
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OnlyAllowNodeZones(f, zoneCount, image)
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})
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})
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// OnlyAllowNodeZones tests that GetAllCurrentZones returns only zones with Nodes
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func OnlyAllowNodeZones(f *framework.Framework, zoneCount int, image string) {
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gceCloud, err := gce.GetGCECloud()
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framework.ExpectNoError(err)
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// Get all the zones that the nodes are in
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expectedZones, err := gceCloud.GetAllZonesFromCloudProvider()
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framework.ExpectNoError(err)
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e2elog.Logf("Expected zones: %v", expectedZones)
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// Get all the zones in this current region
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region := gceCloud.Region()
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allZonesInRegion, err := gceCloud.ListZonesInRegion(region)
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framework.ExpectNoError(err)
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var extraZone string
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for _, zone := range allZonesInRegion {
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if !expectedZones.Has(zone.Name) {
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extraZone = zone.Name
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break
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}
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}
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gomega.Expect(extraZone).NotTo(gomega.Equal(""), fmt.Sprintf("No extra zones available in region %s", region))
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ginkgo.By(fmt.Sprintf("starting a compute instance in unused zone: %v\n", extraZone))
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project := framework.TestContext.CloudConfig.ProjectID
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zone := extraZone
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myuuid := string(uuid.NewUUID())
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name := "compute-" + myuuid
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imageURL := "https://www.googleapis.com/compute/v1/projects/debian-cloud/global/images/debian-7-wheezy-v20140606"
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rb := &compute.Instance{
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MachineType: "zones/" + zone + "/machineTypes/f1-micro",
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Disks: []*compute.AttachedDisk{
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{
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AutoDelete: true,
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Boot: true,
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Type: "PERSISTENT",
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InitializeParams: &compute.AttachedDiskInitializeParams{
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DiskName: "my-root-pd-" + myuuid,
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SourceImage: imageURL,
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},
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},
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},
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NetworkInterfaces: []*compute.NetworkInterface{
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{
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AccessConfigs: []*compute.AccessConfig{
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{
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Type: "ONE_TO_ONE_NAT",
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Name: "External NAT",
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},
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},
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Network: "/global/networks/default",
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},
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},
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Name: name,
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}
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err = gceCloud.InsertInstance(project, zone, rb)
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framework.ExpectNoError(err)
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defer func() {
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// Teardown of the compute instance
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e2elog.Logf("Deleting compute resource: %v", name)
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err := gceCloud.DeleteInstance(project, zone, name)
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framework.ExpectNoError(err)
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}()
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ginkgo.By("Creating zoneCount+1 PVCs and making sure PDs are only provisioned in zones with nodes")
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// Create some (zoneCount+1) PVCs with names of form "pvc-x" where x is 1...zoneCount+1
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// This will exploit ChooseZoneForVolume in pkg/volume/util.go to provision them in all the zones it "sees"
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var pvcList []*v1.PersistentVolumeClaim
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c := f.ClientSet
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ns := f.Namespace.Name
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for index := 1; index <= zoneCount+1; index++ {
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pvc := newNamedDefaultClaim(ns, index)
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pvc, err = framework.CreatePVC(c, ns, pvc)
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framework.ExpectNoError(err)
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pvcList = append(pvcList, pvc)
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// Defer the cleanup
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defer func() {
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e2elog.Logf("deleting claim %q/%q", pvc.Namespace, pvc.Name)
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err = c.CoreV1().PersistentVolumeClaims(pvc.Namespace).Delete(pvc.Name, nil)
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if err != nil {
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framework.Failf("Error deleting claim %q. Error: %v", pvc.Name, err)
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}
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}()
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}
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// Wait for all claims bound
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for _, claim := range pvcList {
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err = framework.WaitForPersistentVolumeClaimPhase(v1.ClaimBound, c, claim.Namespace, claim.Name, framework.Poll, framework.ClaimProvisionTimeout)
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framework.ExpectNoError(err)
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}
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pvZones := sets.NewString()
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ginkgo.By("Checking that PDs have been provisioned in only the expected zones")
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for _, claim := range pvcList {
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// Get a new copy of the claim to have all fields populated
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claim, err = c.CoreV1().PersistentVolumeClaims(claim.Namespace).Get(claim.Name, metav1.GetOptions{})
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framework.ExpectNoError(err)
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// Get the related PV
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pv, err := c.CoreV1().PersistentVolumes().Get(claim.Spec.VolumeName, metav1.GetOptions{})
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framework.ExpectNoError(err)
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pvZone, ok := pv.ObjectMeta.Labels[v1.LabelZoneFailureDomain]
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gomega.Expect(ok).To(gomega.BeTrue(), "PV has no LabelZone to be found")
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pvZones.Insert(pvZone)
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}
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gomega.Expect(pvZones.Equal(expectedZones)).To(gomega.BeTrue(), fmt.Sprintf("PDs provisioned in unwanted zones. We want zones: %v, got: %v", expectedZones, pvZones))
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}
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type staticPVTestConfig struct {
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pvSource *v1.PersistentVolumeSource
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pv *v1.PersistentVolume
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pvc *v1.PersistentVolumeClaim
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pod *v1.Pod
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}
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// PodsUseStaticPVsOrFail Check that the pods using statically
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// created PVs get scheduled to the same zone that the PV is in.
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func PodsUseStaticPVsOrFail(f *framework.Framework, podCount int, image string) {
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var err error
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c := f.ClientSet
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ns := f.Namespace.Name
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zones, err := framework.GetClusterZones(c)
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framework.ExpectNoError(err)
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zonelist := zones.List()
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ginkgo.By("Creating static PVs across zones")
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configs := make([]*staticPVTestConfig, podCount)
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for i := range configs {
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configs[i] = &staticPVTestConfig{}
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}
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defer func() {
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ginkgo.By("Cleaning up pods and PVs")
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for _, config := range configs {
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framework.DeletePodOrFail(c, ns, config.pod.Name)
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}
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for _, config := range configs {
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framework.WaitForPodNoLongerRunningInNamespace(c, config.pod.Name, ns)
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framework.PVPVCCleanup(c, ns, config.pv, config.pvc)
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err = framework.DeletePVSource(config.pvSource)
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framework.ExpectNoError(err)
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}
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}()
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for i, config := range configs {
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zone := zonelist[i%len(zones)]
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config.pvSource, err = framework.CreatePVSource(zone)
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framework.ExpectNoError(err)
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pvConfig := framework.PersistentVolumeConfig{
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NamePrefix: "multizone-pv",
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PVSource: *config.pvSource,
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Prebind: nil,
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}
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className := ""
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pvcConfig := framework.PersistentVolumeClaimConfig{StorageClassName: &className}
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config.pv, config.pvc, err = framework.CreatePVPVC(c, pvConfig, pvcConfig, ns, true)
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framework.ExpectNoError(err)
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}
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ginkgo.By("Waiting for all PVCs to be bound")
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for _, config := range configs {
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framework.WaitOnPVandPVC(c, ns, config.pv, config.pvc)
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}
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ginkgo.By("Creating pods for each static PV")
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for _, config := range configs {
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podConfig := framework.MakePod(ns, nil, []*v1.PersistentVolumeClaim{config.pvc}, false, "")
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config.pod, err = c.CoreV1().Pods(ns).Create(podConfig)
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framework.ExpectNoError(err)
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}
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ginkgo.By("Waiting for all pods to be running")
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for _, config := range configs {
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err = framework.WaitForPodRunningInNamespace(c, config.pod)
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framework.ExpectNoError(err)
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}
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}
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func newNamedDefaultClaim(ns string, index int) *v1.PersistentVolumeClaim {
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claim := v1.PersistentVolumeClaim{
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ObjectMeta: metav1.ObjectMeta{
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Name: "pvc-" + strconv.Itoa(index),
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Namespace: ns,
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},
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Spec: v1.PersistentVolumeClaimSpec{
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AccessModes: []v1.PersistentVolumeAccessMode{
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v1.ReadWriteOnce,
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},
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Resources: v1.ResourceRequirements{
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Requests: v1.ResourceList{
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v1.ResourceName(v1.ResourceStorage): resource.MustParse("1Gi"),
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},
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},
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},
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}
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return &claim
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}
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