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Merge pull request #59682 from msau42/local-e2e-stress

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Automatic merge from submit-queue. If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

Add Local PV stress test

**What this PR does / why we need it**:
Test heavy usage of local PVs to help test robustness of the volume scheduler, and make sure we don't encounter partial binding failures under load.

**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Partially addresses #56100

**Special notes for your reviewer**:

**Release note**:

```release-note
NONE
```

@kubernetes/sig-storage-pr-reviews
This commit is contained in:
Kubernetes Submit Queue 2018-02-24 22:02:46 -08:00 committed by GitHub
commit be2e702844
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1 changed files with 251 additions and 62 deletions
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313
test/e2e/storage/persistent_volumes-local.go
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@ -18,11 +18,11 @@ package storage
import (
"fmt"
"math/rand"
"path"
"path/filepath"
"strconv"
"strings"
"sync"
"time"
"github.com/ghodss/yaml"
@ -49,12 +49,13 @@ import (
)
type localTestConfig struct {
ns string
nodes []v1.Node
node0 *v1.Node
client clientset.Interface
scName string
ssTester *framework.StatefulSetTester
ns string
nodes []v1.Node
node0 *v1.Node
client clientset.Interface
scName string
ssTester *framework.StatefulSetTester
discoveryDir string
}
type localVolumeType string
@ -97,8 +98,6 @@ const (
// TODO: This may not be available/writable on all images.
hostBase = "/tmp"
containerBase = "/myvol"
// 'hostBase + discoveryDir' is the path for volume discovery.
discoveryDir = "disks"
// Path to the first volume in the test containers
// created via createLocalPod or makeLocalPod
// leveraging pv_util.MakePod
@ -153,18 +152,19 @@ var _ = utils.SIGDescribe("PersistentVolumes-local ", func() {
// Get all the schedulable nodes
nodes := framework.GetReadySchedulableNodesOrDie(f.ClientSet)
Expect(len(nodes.Items)).NotTo(BeZero(), "No available nodes for scheduling")
scName = fmt.Sprintf("%v-%v-%v", testSCPrefix, f.Namespace.Name, rand.Int())
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,
node0: node0,
scName: scName,
ssTester: ssTester,
ns: f.Namespace.Name,
client: f.ClientSet,
nodes: nodes.Items,
node0: node0,
scName: scName,
ssTester: ssTester,
discoveryDir: filepath.Join(hostBase, f.Namespace.Name),
}
})
@ -333,24 +333,21 @@ var _ = utils.SIGDescribe("PersistentVolumes-local ", func() {
BeforeEach(func() {
setupStorageClass(config, &immediateMode)
setupLocalVolumeProvisioner(config)
volumePath = path.Join(
hostBase, discoveryDir, fmt.Sprintf("vol-%v", string(uuid.NewUUID())))
setupLocalVolumeProvisionerMountPoint(config, volumePath)
volumePath = path.Join(config.discoveryDir, fmt.Sprintf("vol-%v", string(uuid.NewUUID())))
setupLocalVolumeProvisionerMountPoint(config, volumePath, config.node0)
})
AfterEach(func() {
cleanupLocalVolumeProvisionerMountPoint(config, volumePath)
cleanupLocalVolumeProvisioner(config, volumePath)
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)
kind := schema.GroupKind{Group: "extensions", Kind: "DaemonSet"}
framework.WaitForControlledPodsRunning(config.client, config.ns, daemonSetName, kind)
By("Waiting for a PersitentVolume to be created")
By("Waiting for a PersistentVolume to be created")
oldPV, err := waitForLocalPersistentVolume(config.client, volumePath)
Expect(err).NotTo(HaveOccurred())
@ -381,6 +378,9 @@ var _ = utils.SIGDescribe("PersistentVolumes-local ", func() {
fileDoesntExistCmd := createFileDoesntExistCmd(volumePath, testFile)
err = framework.IssueSSHCommand(fileDoesntExistCmd, framework.TestContext.Provider, config.node0)
Expect(err).NotTo(HaveOccurred())
By("Deleting provisioner daemonset")
deleteProvisionerDaemonset(config)
})
})
@ -420,9 +420,158 @@ var _ = utils.SIGDescribe("PersistentVolumes-local ", func() {
})
})
// TODO: add stress test that creates many pods in parallel across multiple nodes
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 = 5
)
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), 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) {
@ -869,50 +1018,56 @@ func setupLocalVolumeProvisioner(config *localTestConfig) {
createProvisionerClusterRoleBinding(config)
createVolumeConfigMap(config)
By("Initializing local volume discovery base path")
mkdirCmd := fmt.Sprintf("mkdir -p %v -m 777", path.Join(hostBase, discoveryDir))
err := framework.IssueSSHCommand(mkdirCmd, framework.TestContext.Provider, config.node0)
Expect(err).NotTo(HaveOccurred())
for _, node := range config.nodes {
By(fmt.Sprintf("Initializing local volume discovery base path on node %v", node.Name))
mkdirCmd := fmt.Sprintf("mkdir -p %v -m 777", config.discoveryDir)
err := framework.IssueSSHCommand(mkdirCmd, framework.TestContext.Provider, &node)
Expect(err).NotTo(HaveOccurred())
}
}
func cleanupLocalVolumeProvisioner(config *localTestConfig, volumePath string) {
func cleanupLocalVolumeProvisioner(config *localTestConfig) {
By("Cleaning up cluster role binding")
deleteClusterRoleBinding(config)
By("Removing the test discovery directory")
removeCmd := fmt.Sprintf("rm -r %s", path.Join(hostBase, discoveryDir))
err := framework.IssueSSHCommand(removeCmd, framework.TestContext.Provider, config.node0)
for _, node := range config.nodes {
By(fmt.Sprintf("Removing the test discovery directory on node %v", node.Name))
removeCmd := fmt.Sprintf("[ ! -e %v ] || rm -r %v", config.discoveryDir, config.discoveryDir)
err := framework.IssueSSHCommand(removeCmd, framework.TestContext.Provider, &node)
Expect(err).NotTo(HaveOccurred())
}
}
func setupLocalVolumeProvisionerMountPoint(config *localTestConfig, volumePath string, node *v1.Node) {
By(fmt.Sprintf("Creating local directory at path %q", volumePath))
mkdirCmd := fmt.Sprintf("mkdir %v -m 777", volumePath)
err := framework.IssueSSHCommand(mkdirCmd, framework.TestContext.Provider, node)
Expect(err).NotTo(HaveOccurred())
By(fmt.Sprintf("Mounting local directory at path %q", volumePath))
mntCmd := fmt.Sprintf("sudo mount --bind %v %v", volumePath, volumePath)
err = framework.IssueSSHCommand(mntCmd, framework.TestContext.Provider, node)
Expect(err).NotTo(HaveOccurred())
}
func cleanupLocalVolumeProvisionerMountPoint(config *localTestConfig, volumePath string, node *v1.Node) {
By(fmt.Sprintf("Unmounting the test mount point from %q", volumePath))
umountCmd := fmt.Sprintf("[ ! -e %v ] || sudo umount %v", volumePath, volumePath)
err := framework.IssueSSHCommand(umountCmd, framework.TestContext.Provider, node)
Expect(err).NotTo(HaveOccurred())
By("Removing the test mount point")
removeCmd := fmt.Sprintf("[ ! -e %v ] || rm -r %v", volumePath, volumePath)
err = framework.IssueSSHCommand(removeCmd, framework.TestContext.Provider, node)
Expect(err).NotTo(HaveOccurred())
By("Cleaning up persistent volume")
pv, err := findLocalPersistentVolume(config.client, volumePath)
Expect(err).NotTo(HaveOccurred())
err = config.client.CoreV1().PersistentVolumes().Delete(pv.Name, &metav1.DeleteOptions{})
Expect(err).NotTo(HaveOccurred())
}
func setupLocalVolumeProvisionerMountPoint(config *localTestConfig, volumePath string) {
By(fmt.Sprintf("Creating local directory at path %q", volumePath))
mkdirCmd := fmt.Sprintf("mkdir %v -m 777", volumePath)
err := framework.IssueSSHCommand(mkdirCmd, framework.TestContext.Provider, config.node0)
Expect(err).NotTo(HaveOccurred())
By(fmt.Sprintf("Mounting local directory at path %q", volumePath))
mntCmd := fmt.Sprintf("sudo mount --bind %v %v", volumePath, volumePath)
err = framework.IssueSSHCommand(mntCmd, framework.TestContext.Provider, config.node0)
Expect(err).NotTo(HaveOccurred())
}
func cleanupLocalVolumeProvisionerMountPoint(config *localTestConfig, volumePath string) {
By(fmt.Sprintf("Unmounting the test mount point from %q", volumePath))
umountCmd := fmt.Sprintf("sudo umount %v", volumePath)
err := framework.IssueSSHCommand(umountCmd, framework.TestContext.Provider, config.node0)
Expect(err).NotTo(HaveOccurred())
By("Removing the test mount point")
removeCmd := fmt.Sprintf("rm -r %s", volumePath)
err = framework.IssueSSHCommand(removeCmd, framework.TestContext.Provider, config.node0)
if pv != nil {
err = config.client.CoreV1().PersistentVolumes().Delete(pv.Name, &metav1.DeleteOptions{})
Expect(err).NotTo(HaveOccurred())
}
}
func createServiceAccount(config *localTestConfig) {
@ -967,6 +1122,7 @@ func createProvisionerClusterRoleBinding(config *localTestConfig) {
Subjects: subjects,
}
deleteClusterRoleBinding(config)
_, err := config.client.RbacV1beta1().ClusterRoleBindings().Create(&pvBinding)
Expect(err).NotTo(HaveOccurred())
_, err = config.client.RbacV1beta1().ClusterRoleBindings().Create(&nodeBinding)
@ -995,7 +1151,7 @@ func createVolumeConfigMap(config *localTestConfig) {
var provisionerConfig ProvisionerConfiguration
provisionerConfig.StorageClassConfig = map[string]MountConfig{
config.scName: {
HostDir: path.Join(hostBase, discoveryDir),
HostDir: config.discoveryDir,
MountDir: provisionerDefaultMountRoot,
},
}
@ -1016,6 +1172,7 @@ func createVolumeConfigMap(config *localTestConfig) {
"storageClassMap": string(data),
},
}
_, err = config.client.CoreV1().ConfigMaps(config.ns).Create(&configMap)
Expect(err).NotTo(HaveOccurred())
}
@ -1093,7 +1250,7 @@ func createProvisionerDaemonset(config *localTestConfig) {
Name: "local-disks",
VolumeSource: v1.VolumeSource{
HostPath: &v1.HostPathVolumeSource{
Path: path.Join(hostBase, discoveryDir),
Path: config.discoveryDir,
},
},
},
@ -1104,6 +1261,37 @@ func createProvisionerDaemonset(config *localTestConfig) {
}
_, err := config.client.ExtensionsV1beta1().DaemonSets(config.ns).Create(provisioner)
Expect(err).NotTo(HaveOccurred())
kind := schema.GroupKind{Group: "extensions", Kind: "DaemonSet"}
framework.WaitForControlledPodsRunning(config.client, config.ns, daemonSetName, kind)
}
func deleteProvisionerDaemonset(config *localTestConfig) {
ds, err := config.client.ExtensionsV1beta1().DaemonSets(config.ns).Get(daemonSetName, metav1.GetOptions{})
if ds == nil {
return
}
err = config.client.ExtensionsV1beta1().DaemonSets(config.ns).Delete(daemonSetName, nil)
Expect(err).NotTo(HaveOccurred())
err = wait.PollImmediate(time.Second, time.Minute, func() (bool, error) {
pods, err := config.client.CoreV1().Pods(config.ns).List(metav1.ListOptions{})
if err != nil {
return false, err
}
for _, pod := range pods.Items {
if metav1.IsControlledBy(&pod, ds) {
// DaemonSet pod still exists
return false, nil
}
}
// All DaemonSet pods are deleted
return true, nil
})
Expect(err).NotTo(HaveOccurred())
}
// newLocalClaim creates a new persistent volume claim.
@ -1192,7 +1380,8 @@ func findLocalPersistentVolume(c clientset.Interface, volumePath string) (*v1.Pe
return &p, nil
}
}
return nil, fmt.Errorf("Unable to find local persistent volume with path %v", volumePath)
// Doesn't exist, that's fine, it could be invoked by early cleanup
return nil, nil
}
func createStatefulSet(config *localTestConfig, ssReplicas int32, volumeCount int) *appsv1.StatefulSet {