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persistent_volumes-local.go
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persistent_volumes-local.go
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/*
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 storage
import (
"fmt"
"path"
"path/filepath"
"strconv"
"strings"
"sync"
"time"
"github.com/ghodss/yaml"
. "github.com/onsi/ginkgo"
. "github.com/onsi/gomega"
appsv1 "k8s.io/api/apps/v1"
"k8s.io/api/core/v1"
extv1beta1 "k8s.io/api/extensions/v1beta1"
rbacv1beta1 "k8s.io/api/rbac/v1beta1"
storagev1 "k8s.io/api/storage/v1"
"k8s.io/apimachinery/pkg/api/resource"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/fields"
"k8s.io/apimachinery/pkg/runtime/schema"
utilerrors "k8s.io/apimachinery/pkg/util/errors"
"k8s.io/apimachinery/pkg/util/sets"
"k8s.io/apimachinery/pkg/util/uuid"
"k8s.io/apimachinery/pkg/util/wait"
clientset "k8s.io/client-go/kubernetes"
"k8s.io/kubernetes/test/e2e/framework"
"k8s.io/kubernetes/test/e2e/storage/utils"
imageutils "k8s.io/kubernetes/test/utils/image"
)
type localTestConfig struct {
ns string
nodes []v1.Node
node0 *v1.Node
client clientset.Interface
scName string
ssTester *framework.StatefulSetTester
discoveryDir string
}
type localVolumeType string
const (
// default local volume type, aka a directory
DirectoryLocalVolumeType localVolumeType = "dir"
// creates a tmpfs and mounts it
TmpfsLocalVolumeType localVolumeType = "tmpfs"
// tests based on local ssd at /mnt/disks/by-uuid/
GCELocalSSDVolumeType localVolumeType = "gce-localssd-scsi-fs"
// Creates a local file, formats it, and maps it as a block device.
BlockLocalVolumeType localVolumeType = "block"
)
var setupLocalVolumeMap = map[localVolumeType]func(*localTestConfig, *v1.Node) *localTestVolume{
GCELocalSSDVolumeType: setupLocalVolumeGCELocalSSD,
TmpfsLocalVolumeType: setupLocalVolumeTmpfs,
DirectoryLocalVolumeType: setupLocalVolumeDirectory,
BlockLocalVolumeType: setupLocalVolumeBlock,
}
var cleanupLocalVolumeMap = map[localVolumeType]func(*localTestConfig, *localTestVolume){
GCELocalSSDVolumeType: cleanupLocalVolumeGCELocalSSD,
TmpfsLocalVolumeType: cleanupLocalVolumeTmpfs,
DirectoryLocalVolumeType: cleanupLocalVolumeDirectory,
BlockLocalVolumeType: cleanupLocalVolumeBlock,
}
type localTestVolume struct {
// Node that the volume is on
node *v1.Node
// Path to the volume on the host node
hostDir string
// PVC for this volume
pvc *v1.PersistentVolumeClaim
// PV for this volume
pv *v1.PersistentVolume
// Type of local volume
localVolumeType localVolumeType
// Path to the loop block device on the host node.
// Used during cleanup after block tests.
loopDevDir string
}
const (
// TODO: This may not be available/writable on all images.
hostBase = "/tmp"
containerBase = "/myvol"
// Path to the first volume in the test containers
// created via createLocalPod or makeLocalPod
// leveraging pv_util.MakePod
volumeDir = "/mnt/volume1"
// testFile created in setupLocalVolume
testFile = "test-file"
// testFileContent written into testFile
testFileContent = "test-file-content"
testSCPrefix = "local-volume-test-storageclass"
// Following are constants used for provisioner e2e tests.
//
// testServiceAccount is the service account for bootstrapper
testServiceAccount = "local-storage-admin"
// volumeConfigName is the configmap passed to bootstrapper and provisioner
volumeConfigName = "local-volume-config"
// provisioner image used for e2e tests
provisionerImageName = "quay.io/external_storage/local-volume-provisioner:v2.1.0"
// provisioner daemonSetName name
daemonSetName = "local-volume-provisioner"
// provisioner default mount point folder
provisionerDefaultMountRoot = "/mnt/local-storage"
// provisioner node/pv cluster role binding
nodeBindingName = "local-storage:provisioner-node-binding"
pvBindingName = "local-storage:provisioner-pv-binding"
systemRoleNode = "system:node"
systemRolePVProvisioner = "system:persistent-volume-provisioner"
// A sample request size
testRequestSize = "10Mi"
// Max number of nodes to use for testing
maxNodes = 5
)
var (
// storage class volume binding modes
waitMode = storagev1.VolumeBindingWaitForFirstConsumer
immediateMode = storagev1.VolumeBindingImmediate
// Common selinux labels
selinuxLabel = &v1.SELinuxOptions{
Level: "s0:c0,c1"}
)
var _ = utils.SIGDescribe("PersistentVolumes-local ", func() {
f := framework.NewDefaultFramework("persistent-local-volumes-test")
var (
config *localTestConfig
scName string
)
BeforeEach(func() {
// Get all the schedulable nodes
nodes := framework.GetReadySchedulableNodesOrDie(f.ClientSet)
Expect(len(nodes.Items)).NotTo(BeZero(), "No available nodes for scheduling")
// Cap max number of nodes
maxLen := len(nodes.Items)
if maxLen > maxNodes {
maxLen = maxNodes
}
scName = fmt.Sprintf("%v-%v", testSCPrefix, f.Namespace.Name)
// Choose the first node
node0 := &nodes.Items[0]
ssTester := framework.NewStatefulSetTester(f.ClientSet)
config = &localTestConfig{
ns: f.Namespace.Name,
client: f.ClientSet,
nodes: nodes.Items[:maxLen],
node0: node0,
scName: scName,
ssTester: ssTester,
discoveryDir: filepath.Join(hostBase, f.Namespace.Name),
}
})
localVolumeTypes := []localVolumeType{DirectoryLocalVolumeType, TmpfsLocalVolumeType, GCELocalSSDVolumeType, BlockLocalVolumeType}
for _, tempTestVolType := range localVolumeTypes {
// New variable required for gingko test closures
testVolType := tempTestVolType
serialStr := ""
if testVolType == GCELocalSSDVolumeType {
serialStr = " [Serial]"
}
alphaStr := ""
if testVolType == BlockLocalVolumeType {
alphaStr = " [Feature:BlockVolume]"
}
ctxString := fmt.Sprintf("[Volume type: %s]%v%v", testVolType, serialStr, alphaStr)
testMode := immediateMode
Context(ctxString, func() {
var testVol *localTestVolume
BeforeEach(func() {
if testVolType == GCELocalSSDVolumeType {
SkipUnlessLocalSSDExists("scsi", "fs", config.node0)
}
setupStorageClass(config, &testMode)
testVols := setupLocalVolumesPVCsPVs(config, testVolType, config.node0, 1, testMode)
testVol = testVols[0]
})
AfterEach(func() {
cleanupLocalVolumes(config, []*localTestVolume{testVol})
cleanupStorageClass(config)
})
Context("One pod requesting one prebound PVC", func() {
var (
pod1 *v1.Pod
pod1Err error
)
BeforeEach(func() {
By("Creating pod1")
pod1, pod1Err = createLocalPod(config, testVol)
Expect(pod1Err).NotTo(HaveOccurred())
verifyLocalPod(config, testVol, pod1, config.node0.Name)
})
AfterEach(func() {
By("Deleting pod1")
framework.DeletePodOrFail(config.client, config.ns, pod1.Name)
})
It("should be able to mount volume and read from pod1", func() {
By("Reading in pod1")
// testFileContent was written during setupLocalVolume
testReadFileContent(volumeDir, testFile, testFileContent, pod1, testVolType)
})
It("should be able to mount volume and write from pod1", func() {
// testFileContent was written during setupLocalVolume
testReadFileContent(volumeDir, testFile, testFileContent, pod1, testVolType)
By("Writing in pod1")
writeCmd, _ := createWriteAndReadCmds(volumeDir, testFile, testVol.hostDir /*writeTestFileContent*/, testVolType)
podRWCmdExec(pod1, writeCmd)
})
})
Context("Two pods mounting a local volume at the same time", func() {
It("should be able to write from pod1 and read from pod2", func() {
twoPodsReadWriteTest(config, testVol)
})
})
Context("Two pods mounting a local volume one after the other", func() {
It("should be able to write from pod1 and read from pod2", func() {
twoPodsReadWriteSerialTest(config, testVol)
})
})
})
}
Context("Local volume that cannot be mounted [Slow]", func() {
// TODO:
// - make the pod create timeout shorter
// - check for these errors in unit tests intead
It("should fail due to non-existent path", func() {
ep := &eventPatterns{
reason: "FailedMount",
pattern: make([]string, 2)}
ep.pattern = append(ep.pattern, "MountVolume.SetUp failed")
testVol := &localTestVolume{
node: config.node0,
hostDir: "/non-existent/location/nowhere",
localVolumeType: DirectoryLocalVolumeType,
}
By("Creating local PVC and PV")
createLocalPVCsPVs(config, []*localTestVolume{testVol}, immediateMode)
pod, err := createLocalPod(config, testVol)
Expect(err).To(HaveOccurred())
checkPodEvents(config, pod.Name, ep)
cleanupLocalPVCsPVs(config, []*localTestVolume{testVol})
})
It("should fail due to wrong node", func() {
if len(config.nodes) < 2 {
framework.Skipf("Runs only when number of nodes >= 2")
}
ep := &eventPatterns{
reason: "FailedMount",
pattern: make([]string, 2)}
ep.pattern = append(ep.pattern, "NodeSelectorTerm")
ep.pattern = append(ep.pattern, "MountVolume.NodeAffinity check failed")
testVols := setupLocalVolumesPVCsPVs(config, DirectoryLocalVolumeType, config.node0, 1, immediateMode)
testVol := testVols[0]
pod := makeLocalPodWithNodeName(config, testVol, config.nodes[1].Name)
pod, err := config.client.CoreV1().Pods(config.ns).Create(pod)
Expect(err).NotTo(HaveOccurred())
err = framework.WaitForPodNameRunningInNamespace(config.client, pod.Name, pod.Namespace)
Expect(err).To(HaveOccurred())
checkPodEvents(config, pod.Name, ep)
cleanupLocalVolumes(config, []*localTestVolume{testVol})
})
})
Context("Pod with node different from PV's NodeAffinity", func() {
var (
testVol *localTestVolume
volumeType localVolumeType
)
BeforeEach(func() {
if len(config.nodes) < 2 {
framework.Skipf("Runs only when number of nodes >= 2")
}
volumeType = DirectoryLocalVolumeType
setupStorageClass(config, &immediateMode)
testVols := setupLocalVolumesPVCsPVs(config, volumeType, config.node0, 1, immediateMode)
testVol = testVols[0]
})
AfterEach(func() {
cleanupLocalVolumes(config, []*localTestVolume{testVol})
cleanupStorageClass(config)
})
It("should fail scheduling due to different NodeAffinity", func() {
testPodWithNodeConflict(config, volumeType, config.nodes[1].Name, makeLocalPodWithNodeAffinity, immediateMode)
})
It("should fail scheduling due to different NodeSelector", func() {
testPodWithNodeConflict(config, volumeType, config.nodes[1].Name, makeLocalPodWithNodeSelector, immediateMode)
})
})
Context("Local volume provisioner [Serial]", func() {
var volumePath string
BeforeEach(func() {
setupStorageClass(config, &immediateMode)
setupLocalVolumeProvisioner(config)
volumePath = path.Join(config.discoveryDir, fmt.Sprintf("vol-%v", string(uuid.NewUUID())))
setupLocalVolumeProvisionerMountPoint(config, volumePath, config.node0)
})
AfterEach(func() {
cleanupLocalVolumeProvisionerMountPoint(config, volumePath, config.node0)
cleanupLocalVolumeProvisioner(config)
cleanupStorageClass(config)
})
It("should create and recreate local persistent volume", func() {
By("Starting a provisioner daemonset")
createProvisionerDaemonset(config)
By("Waiting for a PersistentVolume to be created")
oldPV, err := waitForLocalPersistentVolume(config.client, volumePath)
Expect(err).NotTo(HaveOccurred())
// Create a persistent volume claim for local volume: the above volume will be bound.
By("Creating a persistent volume claim")
claim, err := config.client.CoreV1().PersistentVolumeClaims(config.ns).Create(newLocalClaim(config))
Expect(err).NotTo(HaveOccurred())
err = framework.WaitForPersistentVolumeClaimPhase(
v1.ClaimBound, config.client, claim.Namespace, claim.Name, framework.Poll, 1*time.Minute)
Expect(err).NotTo(HaveOccurred())
claim, err = config.client.CoreV1().PersistentVolumeClaims(config.ns).Get(claim.Name, metav1.GetOptions{})
Expect(err).NotTo(HaveOccurred())
Expect(claim.Spec.VolumeName).To(Equal(oldPV.Name))
// Delete the persistent volume claim: file will be cleaned up and volume be re-created.
By("Deleting the persistent volume claim to clean up persistent volume and re-create one")
writeCmd, _ := createWriteAndReadCmds(volumePath, testFile, testFileContent, DirectoryLocalVolumeType)
err = framework.IssueSSHCommand(writeCmd, framework.TestContext.Provider, config.node0)
Expect(err).NotTo(HaveOccurred())
err = config.client.CoreV1().PersistentVolumeClaims(claim.Namespace).Delete(claim.Name, &metav1.DeleteOptions{})
Expect(err).NotTo(HaveOccurred())
By("Waiting for a new PersistentVolume to be re-created")
newPV, err := waitForLocalPersistentVolume(config.client, volumePath)
Expect(err).NotTo(HaveOccurred())
Expect(newPV.UID).NotTo(Equal(oldPV.UID))
fileDoesntExistCmd := createFileDoesntExistCmd(volumePath, testFile)
err = framework.IssueSSHCommand(fileDoesntExistCmd, framework.TestContext.Provider, config.node0)
Expect(err).NotTo(HaveOccurred())
By("Deleting provisioner daemonset")
deleteProvisionerDaemonset(config)
})
})
Context("StatefulSet with pod anti-affinity", func() {
var testVols map[string][]*localTestVolume
const (
ssReplicas = 3
volsPerNode = 2
)
BeforeEach(func() {
if len(config.nodes) < ssReplicas {
framework.Skipf("Runs only when number of nodes >= %v", ssReplicas)
}
setupStorageClass(config, &waitMode)
testVols = map[string][]*localTestVolume{}
for i, node := range config.nodes {
// The PVCs created here won't be used
By(fmt.Sprintf("Setting up local volumes on node %q", node.Name))
vols := setupLocalVolumesPVCsPVs(config, DirectoryLocalVolumeType, &config.nodes[i], volsPerNode, waitMode)
testVols[node.Name] = vols
}
})
AfterEach(func() {
for _, vols := range testVols {
cleanupLocalVolumes(config, vols)
}
cleanupStorageClass(config)
})
It("should use volumes spread across nodes", func() {
By("Creating a StatefulSet with pod anti-affinity on nodes")
ss := createStatefulSet(config, ssReplicas, volsPerNode)
validateStatefulSet(config, ss)
})
})
Context("Stress with local volume provisioner [Serial]", func() {
var testVols [][]string
const (
volsPerNode = 10 // Make this non-divisable by volsPerPod to increase changes of partial binding failure
volsPerPod = 3
podsFactor = 4
)
BeforeEach(func() {
setupStorageClass(config, &waitMode)
setupLocalVolumeProvisioner(config)
testVols = [][]string{}
for i, node := range config.nodes {
By(fmt.Sprintf("Setting up local volumes on node %q", node.Name))
paths := []string{}
for j := 0; j < volsPerNode; j++ {
volumePath := path.Join(config.discoveryDir, fmt.Sprintf("vol-%v", string(uuid.NewUUID())))
setupLocalVolumeProvisionerMountPoint(config, volumePath, &config.nodes[i])
paths = append(paths, volumePath)
}
testVols = append(testVols, paths)
}
By("Starting the local volume provisioner")
createProvisionerDaemonset(config)
})
AfterEach(func() {
By("Deleting provisioner daemonset")
deleteProvisionerDaemonset(config)
for i, paths := range testVols {
for _, volumePath := range paths {
cleanupLocalVolumeProvisionerMountPoint(config, volumePath, &config.nodes[i])
}
}
cleanupLocalVolumeProvisioner(config)
cleanupStorageClass(config)
})
It("should use be able to process many pods and reuse local volumes", func() {
var (
podsLock sync.Mutex
// Have one extra pod pending
numConcurrentPods = volsPerNode/volsPerPod*len(config.nodes) + 1
totalPods = numConcurrentPods * podsFactor
numCreated = 0
numFinished = 0
pods = map[string]*v1.Pod{}
)
// Create pods gradually instead of all at once because scheduler has
// exponential backoff
// TODO: this is still a bit slow because of the provisioner polling period
By(fmt.Sprintf("Creating %v pods periodically", numConcurrentPods))
stop := make(chan struct{})
go wait.Until(func() {
podsLock.Lock()
defer podsLock.Unlock()
if numCreated >= totalPods {
// Created all the pods for the test
return
}
if len(pods) > numConcurrentPods/2 {
// Too many outstanding pods
return
}
for i := 0; i < numConcurrentPods; i++ {
pvcs := []*v1.PersistentVolumeClaim{}
for j := 0; j < volsPerPod; j++ {
pvc := framework.MakePersistentVolumeClaim(makeLocalPVCConfig(config, DirectoryLocalVolumeType), config.ns)
pvc, err := framework.CreatePVC(config.client, config.ns, pvc)
framework.ExpectNoError(err)
pvcs = append(pvcs, pvc)
}
pod := framework.MakeSecPod(config.ns, pvcs, false, "sleep 1", false, false, selinuxLabel)
pod, err := config.client.CoreV1().Pods(config.ns).Create(pod)
Expect(err).NotTo(HaveOccurred())
pods[pod.Name] = pod
numCreated++
}
}, 2*time.Second, stop)
defer func() {
close(stop)
podsLock.Lock()
defer podsLock.Unlock()
for _, pod := range pods {
if err := deletePodAndPVCs(config, pod); err != nil {
framework.Logf("Deleting pod %v failed: %v", pod.Name, err)
}
}
}()
By("Waiting for all pods to complete successfully")
err := wait.PollImmediate(time.Second, 5*time.Minute, func() (done bool, err error) {
podsList, err := config.client.CoreV1().Pods(config.ns).List(metav1.ListOptions{})
if err != nil {
return false, err
}
podsLock.Lock()
defer podsLock.Unlock()
for _, pod := range podsList.Items {
switch pod.Status.Phase {
case v1.PodSucceeded:
// Delete pod and its PVCs
if err := deletePodAndPVCs(config, &pod); err != nil {
return false, err
}
delete(pods, pod.Name)
numFinished++
framework.Logf("%v/%v pods finished", numFinished, totalPods)
case v1.PodFailed:
case v1.PodUnknown:
return false, fmt.Errorf("pod %v is in %v phase", pod.Name, pod.Status.Phase)
}
}
return numFinished == totalPods, nil
})
Expect(err).ToNot(HaveOccurred())
})
})
})
func deletePodAndPVCs(config *localTestConfig, pod *v1.Pod) error {
framework.Logf("Deleting pod %v", pod.Name)
if err := config.client.CoreV1().Pods(config.ns).Delete(pod.Name, nil); err != nil {
return err
}
// Delete PVCs
for _, vol := range pod.Spec.Volumes {
pvcSource := vol.VolumeSource.PersistentVolumeClaim
if pvcSource != nil {
if err := framework.DeletePersistentVolumeClaim(config.client, pvcSource.ClaimName, config.ns); err != nil {
return err
}
}
}
return nil
}
type makeLocalPodWith func(config *localTestConfig, volume *localTestVolume, nodeName string) *v1.Pod
func testPodWithNodeConflict(config *localTestConfig, testVolType localVolumeType, nodeName string, makeLocalPodFunc makeLocalPodWith, bindingMode storagev1.VolumeBindingMode) {
By(fmt.Sprintf("local-volume-type: %s", testVolType))
testVols := setupLocalVolumesPVCsPVs(config, testVolType, config.node0, 1, bindingMode)
testVol := testVols[0]
pod := makeLocalPodFunc(config, testVol, nodeName)
pod, err := config.client.CoreV1().Pods(config.ns).Create(pod)
Expect(err).NotTo(HaveOccurred())
err = framework.WaitForPodNameUnschedulableInNamespace(config.client, pod.Name, pod.Namespace)
Expect(err).NotTo(HaveOccurred())
cleanupLocalVolumes(config, []*localTestVolume{testVol})
}
type eventPatterns struct {
reason string
pattern []string
}
func checkPodEvents(config *localTestConfig, podName string, ep *eventPatterns) {
var events *v1.EventList
selector := fields.Set{
"involvedObject.kind": "Pod",
"involvedObject.name": podName,
"involvedObject.namespace": config.ns,
"reason": ep.reason,
}.AsSelector().String()
options := metav1.ListOptions{FieldSelector: selector}
events, err := config.client.CoreV1().Events(config.ns).List(options)
Expect(err).NotTo(HaveOccurred())
Expect(len(events.Items)).NotTo(Equal(0))
for _, p := range ep.pattern {
Expect(events.Items[0].Message).To(ContainSubstring(p))
}
}
// The tests below are run against multiple mount point types
// Test two pods at the same time, write from pod1, and read from pod2
func twoPodsReadWriteTest(config *localTestConfig, testVol *localTestVolume) {
By("Creating pod1 to write to the PV")
pod1, pod1Err := createLocalPod(config, testVol)
Expect(pod1Err).NotTo(HaveOccurred())
verifyLocalPod(config, testVol, pod1, config.node0.Name)
// testFileContent was written during setupLocalVolume
testReadFileContent(volumeDir, testFile, testFileContent, pod1, testVol.localVolumeType)
By("Creating pod2 to read from the PV")
pod2, pod2Err := createLocalPod(config, testVol)
Expect(pod2Err).NotTo(HaveOccurred())
verifyLocalPod(config, testVol, pod2, config.node0.Name)
// testFileContent was written during setupLocalVolume
testReadFileContent(volumeDir, testFile, testFileContent, pod2, testVol.localVolumeType)
writeCmd := createWriteCmd(volumeDir, testFile, testVol.hostDir /*writeTestFileContent*/, testVol.localVolumeType)
By("Writing in pod1")
podRWCmdExec(pod1, writeCmd)
By("Reading in pod2")
testReadFileContent(volumeDir, testFile, testVol.hostDir, pod2, testVol.localVolumeType)
By("Deleting pod1")
framework.DeletePodOrFail(config.client, config.ns, pod1.Name)
By("Deleting pod2")
framework.DeletePodOrFail(config.client, config.ns, pod2.Name)
}
// Test two pods one after other, write from pod1, and read from pod2
func twoPodsReadWriteSerialTest(config *localTestConfig, testVol *localTestVolume) {
By("Creating pod1")
pod1, pod1Err := createLocalPod(config, testVol)
Expect(pod1Err).NotTo(HaveOccurred())
verifyLocalPod(config, testVol, pod1, config.node0.Name)
// testFileContent was written during setupLocalVolume
testReadFileContent(volumeDir, testFile, testFileContent, pod1, testVol.localVolumeType)
writeCmd := createWriteCmd(volumeDir, testFile, testVol.hostDir /*writeTestFileContent*/, testVol.localVolumeType)
By("Writing in pod1")
podRWCmdExec(pod1, writeCmd)
By("Deleting pod1")
framework.DeletePodOrFail(config.client, config.ns, pod1.Name)
By("Creating pod2")
pod2, pod2Err := createLocalPod(config, testVol)
Expect(pod2Err).NotTo(HaveOccurred())
verifyLocalPod(config, testVol, pod2, config.node0.Name)
By("Reading in pod2")
testReadFileContent(volumeDir, testFile, testVol.hostDir, pod2, testVol.localVolumeType)
By("Deleting pod2")
framework.DeletePodOrFail(config.client, config.ns, pod2.Name)
}
func setupStorageClass(config *localTestConfig, mode *storagev1.VolumeBindingMode) {
sc := &storagev1.StorageClass{
ObjectMeta: metav1.ObjectMeta{
Name: config.scName,
},
Provisioner: "kubernetes.io/no-provisioner",
VolumeBindingMode: mode,
}
sc, err := config.client.StorageV1().StorageClasses().Create(sc)
Expect(err).NotTo(HaveOccurred())
}
func cleanupStorageClass(config *localTestConfig) {
framework.ExpectNoError(config.client.StorageV1().StorageClasses().Delete(config.scName, nil))
}
// podNode wraps RunKubectl to get node where pod is running
func podNodeName(config *localTestConfig, pod *v1.Pod) (string, error) {
runtimePod, runtimePodErr := config.client.CoreV1().Pods(pod.Namespace).Get(pod.Name, metav1.GetOptions{})
return runtimePod.Spec.NodeName, runtimePodErr
}
// setupLocalVolumes sets up directories to use for local PV
func setupLocalVolumes(config *localTestConfig, localVolumeType localVolumeType, node *v1.Node, count int) []*localTestVolume {
vols := []*localTestVolume{}
for i := 0; i < count; i++ {
setupLocalVolume, ok := setupLocalVolumeMap[localVolumeType]
Expect(ok).To(BeTrue())
testVol := setupLocalVolume(config, node)
vols = append(vols, testVol)
}
return vols
}
func cleanupLocalPVCsPVs(config *localTestConfig, volumes []*localTestVolume) {
for _, volume := range volumes {
By("Cleaning up PVC and PV")
errs := framework.PVPVCCleanup(config.client, config.ns, volume.pv, volume.pvc)
if len(errs) > 0 {
framework.Failf("Failed to delete PV and/or PVC: %v", utilerrors.NewAggregate(errs))
}
}
}
// Deletes the PVC/PV, and launches a pod with hostpath volume to remove the test directory
func cleanupLocalVolumes(config *localTestConfig, volumes []*localTestVolume) {
cleanupLocalPVCsPVs(config, volumes)
for _, volume := range volumes {
cleanup := cleanupLocalVolumeMap[volume.localVolumeType]
cleanup(config, volume)
}
}
func setupWriteTestFile(hostDir string, config *localTestConfig, localVolumeType localVolumeType, node *v1.Node) *localTestVolume {
writeCmd, _ := createWriteAndReadCmds(hostDir, testFile, testFileContent, localVolumeType)
By(fmt.Sprintf("Creating test file on node %q in path %q", node.Name, hostDir))
err := framework.IssueSSHCommand(writeCmd, framework.TestContext.Provider, node)
Expect(err).NotTo(HaveOccurred())
return &localTestVolume{
node: node,
hostDir: hostDir,
localVolumeType: localVolumeType,
}
}
func setupLocalVolumeTmpfs(config *localTestConfig, node *v1.Node) *localTestVolume {
testDirName := "local-volume-test-" + string(uuid.NewUUID())
hostDir := filepath.Join(hostBase, testDirName)
createAndMountTmpfsLocalVolume(config, hostDir, node)
// populate volume with testFile containing testFileContent
return setupWriteTestFile(hostDir, config, TmpfsLocalVolumeType, node)
}
func setupLocalVolumeGCELocalSSD(config *localTestConfig, node *v1.Node) *localTestVolume {
res, err := framework.IssueSSHCommandWithResult("ls /mnt/disks/by-uuid/google-local-ssds-scsi-fs/", framework.TestContext.Provider, node)
Expect(err).NotTo(HaveOccurred())
dirName := strings.Fields(res.Stdout)[0]
hostDir := "/mnt/disks/by-uuid/google-local-ssds-scsi-fs/" + dirName
// Populate volume with testFile containing testFileContent.
return setupWriteTestFile(hostDir, config, GCELocalSSDVolumeType, node)
}
func setupLocalVolumeDirectory(config *localTestConfig, node *v1.Node) *localTestVolume {
testDirName := "local-volume-test-" + string(uuid.NewUUID())
hostDir := filepath.Join(hostBase, testDirName)
// Populate volume with testFile containing testFileContent.
return setupWriteTestFile(hostDir, config, DirectoryLocalVolumeType, node)
}
func setupLocalVolumeBlock(config *localTestConfig, node *v1.Node) *localTestVolume {
testDirName := "local-volume-test-" + string(uuid.NewUUID())
hostDir := filepath.Join(hostBase, testDirName)
createAndMapBlockLocalVolume(config, hostDir, node)
loopDev := getBlockLoopDev(hostDir, node)
// Populate block volume with testFile containing testFileContent.
volume := setupWriteTestFile(loopDev, config, BlockLocalVolumeType, node)
volume.hostDir = loopDev
volume.loopDevDir = hostDir
return volume
}
// Determine the /dev/loopXXX device associated with this test, via its hostDir.
func getBlockLoopDev(hostDir string, node *v1.Node) string {
loopDevCmd := fmt.Sprintf("E2E_LOOP_DEV=$(sudo losetup | grep %s/file | awk '{ print $1 }') 2>&1 > /dev/null && echo ${E2E_LOOP_DEV}", hostDir)
loopDevResult, err := framework.IssueSSHCommandWithResult(loopDevCmd, framework.TestContext.Provider, node)
Expect(err).NotTo(HaveOccurred())
return strings.TrimSpace(loopDevResult.Stdout)
}
func verifyLocalVolume(config *localTestConfig, volume *localTestVolume) {
framework.ExpectNoError(framework.WaitOnPVandPVC(config.client, config.ns, volume.pv, volume.pvc))
}
func verifyLocalPod(config *localTestConfig, volume *localTestVolume, pod *v1.Pod, expectedNodeName string) {
podNodeName, err := podNodeName(config, pod)
Expect(err).NotTo(HaveOccurred())
framework.Logf("pod %q created on Node %q", pod.Name, podNodeName)
Expect(podNodeName).To(Equal(expectedNodeName))
}
// Deletes the PVC/PV, and launches a pod with hostpath volume to remove the test directory.
func cleanupLocalVolumeGCELocalSSD(config *localTestConfig, volume *localTestVolume) {
By("Removing the test directory")
removeCmd := fmt.Sprintf("rm %s", volume.hostDir+"/"+testFile)
err := framework.IssueSSHCommand(removeCmd, framework.TestContext.Provider, volume.node)
Expect(err).NotTo(HaveOccurred())
}
// Deletes the PVC/PV, and launches a pod with hostpath volume to remove the test directory.
func cleanupLocalVolumeTmpfs(config *localTestConfig, volume *localTestVolume) {
unmountTmpfsLocalVolume(config, volume.hostDir, volume.node)
By("Removing the test directory")
removeCmd := fmt.Sprintf("rm -r %s", volume.hostDir)
err := framework.IssueSSHCommand(removeCmd, framework.TestContext.Provider, volume.node)
Expect(err).NotTo(HaveOccurred())
}
// Deletes the PVC/PV, and launches a pod with hostpath volume to remove the test directory.
func cleanupLocalVolumeDirectory(config *localTestConfig, volume *localTestVolume) {
By("Removing the test directory")
removeCmd := fmt.Sprintf("rm -r %s", volume.hostDir)
err := framework.IssueSSHCommand(removeCmd, framework.TestContext.Provider, volume.node)
Expect(err).NotTo(HaveOccurred())
}
// Deletes the PVC/PV and removes the test directory holding the block file.
func cleanupLocalVolumeBlock(config *localTestConfig, volume *localTestVolume) {
volume.hostDir = volume.loopDevDir
unmapBlockLocalVolume(config, volume.hostDir, volume.node)
By("Removing the test directory")
removeCmd := fmt.Sprintf("rm -r %s", volume.hostDir)
err := framework.IssueSSHCommand(removeCmd, framework.TestContext.Provider, volume.node)
Expect(err).NotTo(HaveOccurred())
}
func makeLocalPVCConfig(config *localTestConfig, volumeType localVolumeType) framework.PersistentVolumeClaimConfig {
pvcConfig := framework.PersistentVolumeClaimConfig{
AccessModes: []v1.PersistentVolumeAccessMode{v1.ReadWriteOnce},
StorageClassName: &config.scName,
}
if volumeType == BlockLocalVolumeType {
pvcVolumeMode := v1.PersistentVolumeBlock
pvcConfig.VolumeMode = &pvcVolumeMode
}
return pvcConfig
}
func makeLocalPVConfig(config *localTestConfig, volume *localTestVolume) framework.PersistentVolumeConfig {
// TODO: hostname may not be the best option
nodeKey := "kubernetes.io/hostname"
if volume.node.Labels == nil {
framework.Failf("Node does not have labels")
}
nodeValue, found := volume.node.Labels[nodeKey]
if !found {
framework.Failf("Node does not have required label %q", nodeKey)
}
pvConfig := framework.PersistentVolumeConfig{
PVSource: v1.PersistentVolumeSource{
Local: &v1.LocalVolumeSource{
Path: volume.hostDir,
},
},
NamePrefix: "local-pv",
StorageClassName: config.scName,
NodeAffinity: &v1.VolumeNodeAffinity{
Required: &v1.NodeSelector{
NodeSelectorTerms: []v1.NodeSelectorTerm{
{
MatchExpressions: []v1.NodeSelectorRequirement{
{
Key: nodeKey,
Operator: v1.NodeSelectorOpIn,
Values: []string{nodeValue},
},
},
},
},
},
},
}
if volume.localVolumeType == BlockLocalVolumeType {
pvVolumeMode := v1.PersistentVolumeBlock
pvConfig.VolumeMode = &pvVolumeMode
}
return pvConfig
}
// Creates a PVC and PV with prebinding
func createLocalPVCsPVs(config *localTestConfig, volumes []*localTestVolume, mode storagev1.VolumeBindingMode) {
var err error
for _, volume := range volumes {
pvcConfig := makeLocalPVCConfig(config, volume.localVolumeType)
pvConfig := makeLocalPVConfig(config, volume)
volume.pv, volume.pvc, err = framework.CreatePVPVC(config.client, pvConfig, pvcConfig, config.ns, false)
framework.ExpectNoError(err)
}
if mode == storagev1.VolumeBindingImmediate {
for _, volume := range volumes {
verifyLocalVolume(config, volume)
}
} else {
// Verify PVCs are not bound
// There isn't really a great way to verify this without making the test be slow...
err = wait.PollImmediate(time.Second, 10*time.Second, func() (done bool, err error) {
for _, volume := range volumes {
pvc, err := config.client.CoreV1().PersistentVolumeClaims(volume.pvc.Namespace).Get(volume.pvc.Name, metav1.GetOptions{})
framework.ExpectNoError(err)
Expect(pvc.Status.Phase).To(Equal(v1.ClaimPending))
}
return false, nil
})
Expect(err).To(HaveOccurred())
}
}
func makeLocalPod(config *localTestConfig, volume *localTestVolume, cmd string) *v1.Pod {
pod := framework.MakeSecPod(config.ns, []*v1.PersistentVolumeClaim{volume.pvc}, false, cmd, false, false, selinuxLabel)
if pod == nil {
return pod
}
if volume.localVolumeType == BlockLocalVolumeType {
// Block e2e tests require utilities for writing to block devices (e.g. dd), and nginx has this utilites.
pod.Spec.Containers[0].Image = imageutils.GetE2EImage(imageutils.NginxSlim)
}
return pod
}
func makeLocalPodWithNodeAffinity(config *localTestConfig, volume *localTestVolume, nodeName string) (pod *v1.Pod) {
pod = framework.MakeSecPod(config.ns, []*v1.PersistentVolumeClaim{volume.pvc}, false, "", false, false, selinuxLabel)
if pod == nil {
return
}
affinity := &v1.Affinity{
NodeAffinity: &v1.NodeAffinity{
RequiredDuringSchedulingIgnoredDuringExecution: &v1.NodeSelector{
NodeSelectorTerms: []v1.NodeSelectorTerm{
{
MatchExpressions: []v1.NodeSelectorRequirement{
{
Key: "kubernetes.io/hostname",
Operator: v1.NodeSelectorOpIn,
Values: []string{nodeName},
},
},
},
},
},
},
}
pod.Spec.Affinity = affinity
return
}
func makeLocalPodWithNodeSelector(config *localTestConfig, volume *localTestVolume, nodeName string) (pod *v1.Pod) {
pod = framework.MakeSecPod(config.ns, []*v1.PersistentVolumeClaim{volume.pvc}, false, "", false, false, selinuxLabel)
if pod == nil {
return
}
ns := map[string]string{
"kubernetes.io/hostname": nodeName,
}
pod.Spec.NodeSelector = ns
return
}
func makeLocalPodWithNodeName(config *localTestConfig, volume *localTestVolume, nodeName string) (pod *v1.Pod) {
pod = framework.MakeSecPod(config.ns, []*v1.PersistentVolumeClaim{volume.pvc}, false, "", false, false, selinuxLabel)
if pod == nil {
return
}
pod.Spec.NodeName = nodeName
return
}