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framework_test.go
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framework_test.go
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/*
Copyright 2016 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 persistentvolume
import (
"errors"
"fmt"
"reflect"
"strconv"
"strings"
"sync"
"sync/atomic"
"testing"
"time"
"k8s.io/klog"
v1 "k8s.io/api/core/v1"
storage "k8s.io/api/storage/v1"
apierrs "k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/api/resource"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/runtime/schema"
"k8s.io/apimachinery/pkg/types"
"k8s.io/apimachinery/pkg/util/diff"
"k8s.io/apimachinery/pkg/util/wait"
"k8s.io/apimachinery/pkg/watch"
utilfeature "k8s.io/apiserver/pkg/util/feature"
"k8s.io/client-go/informers"
clientset "k8s.io/client-go/kubernetes"
"k8s.io/client-go/kubernetes/fake"
corelisters "k8s.io/client-go/listers/core/v1"
storagelisters "k8s.io/client-go/listers/storage/v1"
core "k8s.io/client-go/testing"
"k8s.io/client-go/tools/cache"
"k8s.io/client-go/tools/record"
"k8s.io/kubernetes/pkg/api/testapi"
"k8s.io/kubernetes/pkg/controller"
"k8s.io/kubernetes/pkg/features"
vol "k8s.io/kubernetes/pkg/volume"
"k8s.io/kubernetes/pkg/volume/util/recyclerclient"
)
// This is a unit test framework for persistent volume controller.
// It fills the controller with test claims/volumes and can simulate these
// scenarios:
// 1) Call syncClaim/syncVolume once.
// 2) Call syncClaim/syncVolume several times (both simulating "claim/volume
// modified" events and periodic sync), until the controller settles down and
// does not modify anything.
// 3) Simulate almost real API server/etcd and call add/update/delete
// volume/claim.
// In all these scenarios, when the test finishes, the framework can compare
// resulting claims/volumes with list of expected claims/volumes and report
// differences.
// controllerTest contains a single controller test input.
// Each test has initial set of volumes and claims that are filled into the
// controller before the test starts. The test then contains a reference to
// function to call as the actual test. Available functions are:
// - testSyncClaim - calls syncClaim on the first claim in initialClaims.
// - testSyncClaimError - calls syncClaim on the first claim in initialClaims
// and expects an error to be returned.
// - testSyncVolume - calls syncVolume on the first volume in initialVolumes.
// - any custom function for specialized tests.
// The test then contains list of volumes/claims that are expected at the end
// of the test and list of generated events.
type controllerTest struct {
// Name of the test, for logging
name string
// Initial content of controller volume cache.
initialVolumes []*v1.PersistentVolume
// Expected content of controller volume cache at the end of the test.
expectedVolumes []*v1.PersistentVolume
// Initial content of controller claim cache.
initialClaims []*v1.PersistentVolumeClaim
// Expected content of controller claim cache at the end of the test.
expectedClaims []*v1.PersistentVolumeClaim
// Expected events - any event with prefix will pass, we don't check full
// event message.
expectedEvents []string
// Errors to produce on matching action
errors []reactorError
// Function to call as the test.
test testCall
}
type testCall func(ctrl *PersistentVolumeController, reactor *volumeReactor, test controllerTest) error
const testNamespace = "default"
const mockPluginName = "kubernetes.io/mock-volume"
var versionConflictError = errors.New("VersionError")
var novolumes []*v1.PersistentVolume
var noclaims []*v1.PersistentVolumeClaim
var noevents = []string{}
var noerrors = []reactorError{}
// volumeReactor is a core.Reactor that simulates etcd and API server. It
// stores:
// - Latest version of claims volumes saved by the controller.
// - Queue of all saves (to simulate "volume/claim updated" events). This queue
// contains all intermediate state of an object - e.g. a claim.VolumeName
// is updated first and claim.Phase second. This queue will then contain both
// updates as separate entries.
// - Number of changes since the last call to volumeReactor.syncAll().
// - Optionally, volume and claim fake watchers which should be the same ones
// used by the controller. Any time an event function like deleteVolumeEvent
// is called to simulate an event, the reactor's stores are updated and the
// controller is sent the event via the fake watcher.
// - Optionally, list of error that should be returned by reactor, simulating
// etcd / API server failures. These errors are evaluated in order and every
// error is returned only once. I.e. when the reactor finds matching
// reactorError, it return appropriate error and removes the reactorError from
// the list.
type volumeReactor struct {
volumes map[string]*v1.PersistentVolume
claims map[string]*v1.PersistentVolumeClaim
changedObjects []interface{}
changedSinceLastSync int
ctrl *PersistentVolumeController
fakeVolumeWatch *watch.FakeWatcher
fakeClaimWatch *watch.FakeWatcher
lock sync.Mutex
errors []reactorError
watchers map[schema.GroupVersionResource]map[string][]*watch.RaceFreeFakeWatcher
}
// reactorError is an error that is returned by test reactor (=simulated
// etcd+/API server) when an action performed by the reactor matches given verb
// ("get", "update", "create", "delete" or "*"") on given resource
// ("persistentvolumes", "persistentvolumeclaims" or "*").
type reactorError struct {
verb string
resource string
error error
}
// React is a callback called by fake kubeClient from the controller.
// In other words, every claim/volume change performed by the controller ends
// here.
// This callback checks versions of the updated objects and refuse those that
// are too old (simulating real etcd).
// All updated objects are stored locally to keep track of object versions and
// to evaluate test results.
// All updated objects are also inserted into changedObjects queue and
// optionally sent back to the controller via its watchers.
func (r *volumeReactor) React(action core.Action) (handled bool, ret runtime.Object, err error) {
r.lock.Lock()
defer r.lock.Unlock()
klog.V(4).Infof("reactor got operation %q on %q", action.GetVerb(), action.GetResource())
// Inject error when requested
err = r.injectReactError(action)
if err != nil {
return true, nil, err
}
// Test did not request to inject an error, continue simulating API server.
switch {
case action.Matches("create", "persistentvolumes"):
obj := action.(core.UpdateAction).GetObject()
volume := obj.(*v1.PersistentVolume)
// check the volume does not exist
_, found := r.volumes[volume.Name]
if found {
return true, nil, fmt.Errorf("Cannot create volume %s: volume already exists", volume.Name)
}
// mimic apiserver defaulting
if volume.Spec.VolumeMode == nil && utilfeature.DefaultFeatureGate.Enabled(features.BlockVolume) {
volume.Spec.VolumeMode = new(v1.PersistentVolumeMode)
*volume.Spec.VolumeMode = v1.PersistentVolumeFilesystem
}
// Store the updated object to appropriate places.
r.volumes[volume.Name] = volume
for _, w := range r.getWatches(action.GetResource(), action.GetNamespace()) {
w.Add(volume)
}
r.changedObjects = append(r.changedObjects, volume)
r.changedSinceLastSync++
klog.V(4).Infof("created volume %s", volume.Name)
return true, volume, nil
case action.Matches("create", "persistentvolumeclaims"):
obj := action.(core.UpdateAction).GetObject()
claim := obj.(*v1.PersistentVolumeClaim)
// check the claim does not exist
_, found := r.claims[claim.Name]
if found {
return true, nil, fmt.Errorf("Cannot create claim %s: claim already exists", claim.Name)
}
// Store the updated object to appropriate places.
r.claims[claim.Name] = claim
for _, w := range r.getWatches(action.GetResource(), action.GetNamespace()) {
w.Add(claim)
}
r.changedObjects = append(r.changedObjects, claim)
r.changedSinceLastSync++
klog.V(4).Infof("created claim %s", claim.Name)
return true, claim, nil
case action.Matches("update", "persistentvolumes"):
obj := action.(core.UpdateAction).GetObject()
volume := obj.(*v1.PersistentVolume)
// Check and bump object version
storedVolume, found := r.volumes[volume.Name]
if found {
storedVer, _ := strconv.Atoi(storedVolume.ResourceVersion)
requestedVer, _ := strconv.Atoi(volume.ResourceVersion)
if storedVer != requestedVer {
return true, obj, versionConflictError
}
if reflect.DeepEqual(storedVolume, volume) {
klog.V(4).Infof("nothing updated volume %s", volume.Name)
return true, volume, nil
}
// Don't modify the existing object
volume = volume.DeepCopy()
volume.ResourceVersion = strconv.Itoa(storedVer + 1)
} else {
return true, nil, fmt.Errorf("Cannot update volume %s: volume not found", volume.Name)
}
// Store the updated object to appropriate places.
for _, w := range r.getWatches(action.GetResource(), action.GetNamespace()) {
w.Modify(volume)
}
r.volumes[volume.Name] = volume
r.changedObjects = append(r.changedObjects, volume)
r.changedSinceLastSync++
klog.V(4).Infof("saved updated volume %s", volume.Name)
return true, volume, nil
case action.Matches("update", "persistentvolumeclaims"):
obj := action.(core.UpdateAction).GetObject()
claim := obj.(*v1.PersistentVolumeClaim)
// Check and bump object version
storedClaim, found := r.claims[claim.Name]
if found {
storedVer, _ := strconv.Atoi(storedClaim.ResourceVersion)
requestedVer, _ := strconv.Atoi(claim.ResourceVersion)
if storedVer != requestedVer {
return true, obj, versionConflictError
}
if reflect.DeepEqual(storedClaim, claim) {
klog.V(4).Infof("nothing updated claim %s", claim.Name)
return true, claim, nil
}
// Don't modify the existing object
claim = claim.DeepCopy()
claim.ResourceVersion = strconv.Itoa(storedVer + 1)
} else {
return true, nil, fmt.Errorf("Cannot update claim %s: claim not found", claim.Name)
}
// Store the updated object to appropriate places.
for _, w := range r.getWatches(action.GetResource(), action.GetNamespace()) {
w.Modify(claim)
}
r.claims[claim.Name] = claim
r.changedObjects = append(r.changedObjects, claim)
r.changedSinceLastSync++
klog.V(4).Infof("saved updated claim %s", claim.Name)
return true, claim, nil
case action.Matches("get", "persistentvolumes"):
name := action.(core.GetAction).GetName()
volume, found := r.volumes[name]
if found {
klog.V(4).Infof("GetVolume: found %s", volume.Name)
return true, volume.DeepCopy(), nil
} else {
klog.V(4).Infof("GetVolume: volume %s not found", name)
return true, nil, fmt.Errorf("Cannot find volume %s", name)
}
case action.Matches("get", "persistentvolumeclaims"):
name := action.(core.GetAction).GetName()
claim, found := r.claims[name]
if found {
klog.V(4).Infof("GetClaim: found %s", claim.Name)
return true, claim.DeepCopy(), nil
} else {
klog.V(4).Infof("GetClaim: claim %s not found", name)
return true, nil, apierrs.NewNotFound(action.GetResource().GroupResource(), name)
}
case action.Matches("delete", "persistentvolumes"):
name := action.(core.DeleteAction).GetName()
klog.V(4).Infof("deleted volume %s", name)
obj, found := r.volumes[name]
if found {
delete(r.volumes, name)
for _, w := range r.getWatches(action.GetResource(), action.GetNamespace()) {
w.Delete(obj)
}
r.changedSinceLastSync++
return true, nil, nil
} else {
return true, nil, fmt.Errorf("Cannot delete volume %s: not found", name)
}
case action.Matches("delete", "persistentvolumeclaims"):
name := action.(core.DeleteAction).GetName()
klog.V(4).Infof("deleted claim %s", name)
obj, found := r.claims[name]
if found {
delete(r.claims, name)
for _, w := range r.getWatches(action.GetResource(), action.GetNamespace()) {
w.Delete(obj)
}
r.changedSinceLastSync++
return true, nil, nil
} else {
return true, nil, fmt.Errorf("Cannot delete claim %s: not found", name)
}
}
return false, nil, nil
}
// Watch watches objects from the volumeReactor. Watch returns a channel which
// will push added / modified / deleted object.
func (r *volumeReactor) Watch(gvr schema.GroupVersionResource, ns string) (watch.Interface, error) {
r.lock.Lock()
defer r.lock.Unlock()
fakewatcher := watch.NewRaceFreeFake()
if _, exists := r.watchers[gvr]; !exists {
r.watchers[gvr] = make(map[string][]*watch.RaceFreeFakeWatcher)
}
r.watchers[gvr][ns] = append(r.watchers[gvr][ns], fakewatcher)
return fakewatcher, nil
}
func (r *volumeReactor) getWatches(gvr schema.GroupVersionResource, ns string) []*watch.RaceFreeFakeWatcher {
watches := []*watch.RaceFreeFakeWatcher{}
if r.watchers[gvr] != nil {
if w := r.watchers[gvr][ns]; w != nil {
watches = append(watches, w...)
}
if ns != metav1.NamespaceAll {
if w := r.watchers[gvr][metav1.NamespaceAll]; w != nil {
watches = append(watches, w...)
}
}
}
return watches
}
// injectReactError returns an error when the test requested given action to
// fail. nil is returned otherwise.
func (r *volumeReactor) injectReactError(action core.Action) error {
if len(r.errors) == 0 {
// No more errors to inject, everything should succeed.
return nil
}
for i, expected := range r.errors {
klog.V(4).Infof("trying to match %q %q with %q %q", expected.verb, expected.resource, action.GetVerb(), action.GetResource())
if action.Matches(expected.verb, expected.resource) {
// That's the action we're waiting for, remove it from injectedErrors
r.errors = append(r.errors[:i], r.errors[i+1:]...)
klog.V(4).Infof("reactor found matching error at index %d: %q %q, returning %v", i, expected.verb, expected.resource, expected.error)
return expected.error
}
}
return nil
}
// checkVolumes compares all expectedVolumes with set of volumes at the end of
// the test and reports differences.
func (r *volumeReactor) checkVolumes(expectedVolumes []*v1.PersistentVolume) error {
r.lock.Lock()
defer r.lock.Unlock()
expectedMap := make(map[string]*v1.PersistentVolume)
gotMap := make(map[string]*v1.PersistentVolume)
// Clear any ResourceVersion from both sets
for _, v := range expectedVolumes {
// Don't modify the existing object
v := v.DeepCopy()
v.ResourceVersion = ""
if v.Spec.ClaimRef != nil {
v.Spec.ClaimRef.ResourceVersion = ""
}
expectedMap[v.Name] = v
}
for _, v := range r.volumes {
// We must clone the volume because of golang race check - it was
// written by the controller without any locks on it.
v := v.DeepCopy()
v.ResourceVersion = ""
if v.Spec.ClaimRef != nil {
v.Spec.ClaimRef.ResourceVersion = ""
}
gotMap[v.Name] = v
}
if !reflect.DeepEqual(expectedMap, gotMap) {
// Print ugly but useful diff of expected and received objects for
// easier debugging.
return fmt.Errorf("Volume check failed [A-expected, B-got]: %s", diff.ObjectDiff(expectedMap, gotMap))
}
return nil
}
// checkClaims compares all expectedClaims with set of claims at the end of the
// test and reports differences.
func (r *volumeReactor) checkClaims(expectedClaims []*v1.PersistentVolumeClaim) error {
r.lock.Lock()
defer r.lock.Unlock()
expectedMap := make(map[string]*v1.PersistentVolumeClaim)
gotMap := make(map[string]*v1.PersistentVolumeClaim)
for _, c := range expectedClaims {
// Don't modify the existing object
c = c.DeepCopy()
c.ResourceVersion = ""
expectedMap[c.Name] = c
}
for _, c := range r.claims {
// We must clone the claim because of golang race check - it was
// written by the controller without any locks on it.
c = c.DeepCopy()
c.ResourceVersion = ""
gotMap[c.Name] = c
}
if !reflect.DeepEqual(expectedMap, gotMap) {
// Print ugly but useful diff of expected and received objects for
// easier debugging.
return fmt.Errorf("Claim check failed [A-expected, B-got result]: %s", diff.ObjectDiff(expectedMap, gotMap))
}
return nil
}
// checkEvents compares all expectedEvents with events generated during the test
// and reports differences.
func checkEvents(t *testing.T, expectedEvents []string, ctrl *PersistentVolumeController) error {
var err error
// Read recorded events - wait up to 1 minute to get all the expected ones
// (just in case some goroutines are slower with writing)
timer := time.NewTimer(time.Minute)
defer timer.Stop()
fakeRecorder := ctrl.eventRecorder.(*record.FakeRecorder)
gotEvents := []string{}
finished := false
for len(gotEvents) < len(expectedEvents) && !finished {
select {
case event, ok := <-fakeRecorder.Events:
if ok {
klog.V(5).Infof("event recorder got event %s", event)
gotEvents = append(gotEvents, event)
} else {
klog.V(5).Infof("event recorder finished")
finished = true
}
case _, _ = <-timer.C:
klog.V(5).Infof("event recorder timeout")
finished = true
}
}
// Evaluate the events
for i, expected := range expectedEvents {
if len(gotEvents) <= i {
t.Errorf("Event %q not emitted", expected)
err = fmt.Errorf("Events do not match")
continue
}
received := gotEvents[i]
if !strings.HasPrefix(received, expected) {
t.Errorf("Unexpected event received, expected %q, got %q", expected, received)
err = fmt.Errorf("Events do not match")
}
}
for i := len(expectedEvents); i < len(gotEvents); i++ {
t.Errorf("Unexpected event received: %q", gotEvents[i])
err = fmt.Errorf("Events do not match")
}
return err
}
// popChange returns one recorded updated object, either *v1.PersistentVolume
// or *v1.PersistentVolumeClaim. Returns nil when there are no changes.
func (r *volumeReactor) popChange() interface{} {
r.lock.Lock()
defer r.lock.Unlock()
if len(r.changedObjects) == 0 {
return nil
}
// For debugging purposes, print the queue
for _, obj := range r.changedObjects {
switch obj.(type) {
case *v1.PersistentVolume:
vol, _ := obj.(*v1.PersistentVolume)
klog.V(4).Infof("reactor queue: %s", vol.Name)
case *v1.PersistentVolumeClaim:
claim, _ := obj.(*v1.PersistentVolumeClaim)
klog.V(4).Infof("reactor queue: %s", claim.Name)
}
}
// Pop the first item from the queue and return it
obj := r.changedObjects[0]
r.changedObjects = r.changedObjects[1:]
return obj
}
// syncAll simulates the controller periodic sync of volumes and claim. It
// simply adds all these objects to the internal queue of updates. This method
// should be used when the test manually calls syncClaim/syncVolume. Test that
// use real controller loop (ctrl.Run()) will get periodic sync automatically.
func (r *volumeReactor) syncAll() {
r.lock.Lock()
defer r.lock.Unlock()
for _, c := range r.claims {
r.changedObjects = append(r.changedObjects, c)
}
for _, v := range r.volumes {
r.changedObjects = append(r.changedObjects, v)
}
r.changedSinceLastSync = 0
}
func (r *volumeReactor) getChangeCount() int {
r.lock.Lock()
defer r.lock.Unlock()
return r.changedSinceLastSync
}
// waitForIdle waits until all tests, controllers and other goroutines do their
// job and no new actions are registered for 10 milliseconds.
func (r *volumeReactor) waitForIdle() {
r.ctrl.runningOperations.WaitForCompletion()
// Check every 10ms if the controller does something and stop if it's
// idle.
oldChanges := -1
for {
time.Sleep(10 * time.Millisecond)
changes := r.getChangeCount()
if changes == oldChanges {
// No changes for last 10ms -> controller must be idle.
break
}
oldChanges = changes
}
}
// waitTest waits until all tests, controllers and other goroutines do their
// job and list of current volumes/claims is equal to list of expected
// volumes/claims (with ~10 second timeout).
func (r *volumeReactor) waitTest(test controllerTest) error {
// start with 10 ms, multiply by 2 each step, 10 steps = 10.23 seconds
backoff := wait.Backoff{
Duration: 10 * time.Millisecond,
Jitter: 0,
Factor: 2,
Steps: 10,
}
err := wait.ExponentialBackoff(backoff, func() (done bool, err error) {
// Finish all operations that are in progress
r.ctrl.runningOperations.WaitForCompletion()
// Return 'true' if the reactor reached the expected state
err1 := r.checkClaims(test.expectedClaims)
err2 := r.checkVolumes(test.expectedVolumes)
if err1 == nil && err2 == nil {
return true, nil
}
return false, nil
})
return err
}
// deleteVolumeEvent simulates that a volume has been deleted in etcd and
// the controller receives 'volume deleted' event.
func (r *volumeReactor) deleteVolumeEvent(volume *v1.PersistentVolume) {
r.lock.Lock()
defer r.lock.Unlock()
// Remove the volume from list of resulting volumes.
delete(r.volumes, volume.Name)
// Generate deletion event. Cloned volume is needed to prevent races (and we
// would get a clone from etcd too).
if r.fakeVolumeWatch != nil {
r.fakeVolumeWatch.Delete(volume.DeepCopy())
}
}
// deleteClaimEvent simulates that a claim has been deleted in etcd and the
// controller receives 'claim deleted' event.
func (r *volumeReactor) deleteClaimEvent(claim *v1.PersistentVolumeClaim) {
r.lock.Lock()
defer r.lock.Unlock()
// Remove the claim from list of resulting claims.
delete(r.claims, claim.Name)
// Generate deletion event. Cloned volume is needed to prevent races (and we
// would get a clone from etcd too).
if r.fakeClaimWatch != nil {
r.fakeClaimWatch.Delete(claim.DeepCopy())
}
}
// addVolumeEvent simulates that a volume has been added in etcd and the
// controller receives 'volume added' event.
func (r *volumeReactor) addVolumeEvent(volume *v1.PersistentVolume) {
r.lock.Lock()
defer r.lock.Unlock()
r.volumes[volume.Name] = volume
// Generate event. No cloning is needed, this claim is not stored in the
// controller cache yet.
if r.fakeVolumeWatch != nil {
r.fakeVolumeWatch.Add(volume)
}
}
// modifyVolumeEvent simulates that a volume has been modified in etcd and the
// controller receives 'volume modified' event.
func (r *volumeReactor) modifyVolumeEvent(volume *v1.PersistentVolume) {
r.lock.Lock()
defer r.lock.Unlock()
r.volumes[volume.Name] = volume
// Generate deletion event. Cloned volume is needed to prevent races (and we
// would get a clone from etcd too).
if r.fakeVolumeWatch != nil {
r.fakeVolumeWatch.Modify(volume.DeepCopy())
}
}
// addClaimEvent simulates that a claim has been deleted in etcd and the
// controller receives 'claim added' event.
func (r *volumeReactor) addClaimEvent(claim *v1.PersistentVolumeClaim) {
r.lock.Lock()
defer r.lock.Unlock()
r.claims[claim.Name] = claim
// Generate event. No cloning is needed, this claim is not stored in the
// controller cache yet.
if r.fakeClaimWatch != nil {
r.fakeClaimWatch.Add(claim)
}
}
func newVolumeReactor(client *fake.Clientset, ctrl *PersistentVolumeController, fakeVolumeWatch, fakeClaimWatch *watch.FakeWatcher, errors []reactorError) *volumeReactor {
reactor := &volumeReactor{
volumes: make(map[string]*v1.PersistentVolume),
claims: make(map[string]*v1.PersistentVolumeClaim),
ctrl: ctrl,
fakeVolumeWatch: fakeVolumeWatch,
fakeClaimWatch: fakeClaimWatch,
errors: errors,
watchers: make(map[schema.GroupVersionResource]map[string][]*watch.RaceFreeFakeWatcher),
}
client.AddReactor("create", "persistentvolumes", reactor.React)
client.AddReactor("create", "persistentvolumeclaims", reactor.React)
client.AddReactor("update", "persistentvolumes", reactor.React)
client.AddReactor("update", "persistentvolumeclaims", reactor.React)
client.AddReactor("get", "persistentvolumes", reactor.React)
client.AddReactor("get", "persistentvolumeclaims", reactor.React)
client.AddReactor("delete", "persistentvolumes", reactor.React)
client.AddReactor("delete", "persistentvolumeclaims", reactor.React)
return reactor
}
func alwaysReady() bool { return true }
func newTestController(kubeClient clientset.Interface, informerFactory informers.SharedInformerFactory, enableDynamicProvisioning bool) (*PersistentVolumeController, error) {
if informerFactory == nil {
informerFactory = informers.NewSharedInformerFactory(kubeClient, controller.NoResyncPeriodFunc())
}
params := ControllerParameters{
KubeClient: kubeClient,
SyncPeriod: 5 * time.Second,
VolumePlugins: []vol.VolumePlugin{},
VolumeInformer: informerFactory.Core().V1().PersistentVolumes(),
ClaimInformer: informerFactory.Core().V1().PersistentVolumeClaims(),
ClassInformer: informerFactory.Storage().V1().StorageClasses(),
PodInformer: informerFactory.Core().V1().Pods(),
NodeInformer: informerFactory.Core().V1().Nodes(),
EventRecorder: record.NewFakeRecorder(1000),
EnableDynamicProvisioning: enableDynamicProvisioning,
}
ctrl, err := NewController(params)
if err != nil {
return nil, fmt.Errorf("failed to construct persistentvolume controller: %v", err)
}
ctrl.volumeListerSynced = alwaysReady
ctrl.claimListerSynced = alwaysReady
ctrl.classListerSynced = alwaysReady
// Speed up the test
ctrl.createProvisionedPVInterval = 5 * time.Millisecond
return ctrl, nil
}
// newVolume returns a new volume with given attributes
func newVolume(name, capacity, boundToClaimUID, boundToClaimName string, phase v1.PersistentVolumePhase, reclaimPolicy v1.PersistentVolumeReclaimPolicy, class string, annotations ...string) *v1.PersistentVolume {
fs := v1.PersistentVolumeFilesystem
volume := v1.PersistentVolume{
ObjectMeta: metav1.ObjectMeta{
Name: name,
ResourceVersion: "1",
},
Spec: v1.PersistentVolumeSpec{
Capacity: v1.ResourceList{
v1.ResourceName(v1.ResourceStorage): resource.MustParse(capacity),
},
PersistentVolumeSource: v1.PersistentVolumeSource{
GCEPersistentDisk: &v1.GCEPersistentDiskVolumeSource{},
},
AccessModes: []v1.PersistentVolumeAccessMode{v1.ReadWriteOnce, v1.ReadOnlyMany},
PersistentVolumeReclaimPolicy: reclaimPolicy,
StorageClassName: class,
VolumeMode: &fs,
},
Status: v1.PersistentVolumeStatus{
Phase: phase,
},
}
if boundToClaimName != "" {
volume.Spec.ClaimRef = &v1.ObjectReference{
Kind: "PersistentVolumeClaim",
APIVersion: "v1",
UID: types.UID(boundToClaimUID),
Namespace: testNamespace,
Name: boundToClaimName,
}
}
if len(annotations) > 0 {
volume.Annotations = make(map[string]string)
for _, a := range annotations {
switch a {
case annDynamicallyProvisioned:
volume.Annotations[a] = mockPluginName
default:
volume.Annotations[a] = "yes"
}
}
}
return &volume
}
// withLabels applies the given labels to the first volume in the array and
// returns the array. Meant to be used to compose volumes specified inline in
// a test.
func withLabels(labels map[string]string, volumes []*v1.PersistentVolume) []*v1.PersistentVolume {
volumes[0].Labels = labels
return volumes
}
// withLabelSelector sets the label selector of the first claim in the array
// to be MatchLabels of the given label set and returns the array. Meant
// to be used to compose claims specified inline in a test.
func withLabelSelector(labels map[string]string, claims []*v1.PersistentVolumeClaim) []*v1.PersistentVolumeClaim {
claims[0].Spec.Selector = &metav1.LabelSelector{
MatchLabels: labels,
}
return claims
}
// withVolumeVolumeMode applies the given VolumeMode to the first volume in the array and
// returns the array. Meant to be used to compose volumes specified inline in
// a test.
func withVolumeVolumeMode(mode *v1.PersistentVolumeMode, volumes []*v1.PersistentVolume) []*v1.PersistentVolume {
volumes[0].Spec.VolumeMode = mode
return volumes
}
// withClaimVolumeMode applies the given VolumeMode to the first claim in the array and
// returns the array. Meant to be used to compose volumes specified inline in
// a test.
func withClaimVolumeMode(mode *v1.PersistentVolumeMode, claims []*v1.PersistentVolumeClaim) []*v1.PersistentVolumeClaim {
claims[0].Spec.VolumeMode = mode
return claims
}
// withExpectedCapacity sets the claim.Spec.Capacity of the first claim in the
// array to given value and returns the array. Meant to be used to compose
// claims specified inline in a test.
func withExpectedCapacity(capacity string, claims []*v1.PersistentVolumeClaim) []*v1.PersistentVolumeClaim {
claims[0].Status.Capacity = v1.ResourceList{
v1.ResourceName(v1.ResourceStorage): resource.MustParse(capacity),
}
return claims
}
// withMessage saves given message into volume.Status.Message of the first
// volume in the array and returns the array. Meant to be used to compose
// volumes specified inline in a test.
func withMessage(message string, volumes []*v1.PersistentVolume) []*v1.PersistentVolume {
volumes[0].Status.Message = message
return volumes
}
// newVolumeArray returns array with a single volume that would be returned by
// newVolume() with the same parameters.
func newVolumeArray(name, capacity, boundToClaimUID, boundToClaimName string, phase v1.PersistentVolumePhase, reclaimPolicy v1.PersistentVolumeReclaimPolicy, class string, annotations ...string) []*v1.PersistentVolume {
return []*v1.PersistentVolume{
newVolume(name, capacity, boundToClaimUID, boundToClaimName, phase, reclaimPolicy, class, annotations...),
}
}
// newClaim returns a new claim with given attributes
func newClaim(name, claimUID, capacity, boundToVolume string, phase v1.PersistentVolumeClaimPhase, class *string, annotations ...string) *v1.PersistentVolumeClaim {
fs := v1.PersistentVolumeFilesystem
claim := v1.PersistentVolumeClaim{
ObjectMeta: metav1.ObjectMeta{
Name: name,
Namespace: testNamespace,
UID: types.UID(claimUID),
ResourceVersion: "1",
},
Spec: v1.PersistentVolumeClaimSpec{
AccessModes: []v1.PersistentVolumeAccessMode{v1.ReadWriteOnce, v1.ReadOnlyMany},
Resources: v1.ResourceRequirements{
Requests: v1.ResourceList{
v1.ResourceName(v1.ResourceStorage): resource.MustParse(capacity),
},
},
VolumeName: boundToVolume,
StorageClassName: class,
VolumeMode: &fs,
},
Status: v1.PersistentVolumeClaimStatus{
Phase: phase,
},
}
// Make sure ref.GetReference(claim) works
claim.ObjectMeta.SelfLink = testapi.Default.SelfLink("pvc", name)
if len(annotations) > 0 {
claim.Annotations = make(map[string]string)
for _, a := range annotations {
switch a {
case annStorageProvisioner:
claim.Annotations[a] = mockPluginName
default:
claim.Annotations[a] = "yes"
}
}
}
// Bound claims must have proper Status.
if phase == v1.ClaimBound {
claim.Status.AccessModes = claim.Spec.AccessModes
// For most of the tests it's enough to copy claim's requested capacity,
// individual tests can adjust it using withExpectedCapacity()
claim.Status.Capacity = claim.Spec.Resources.Requests
}
return &claim
}
// newClaimArray returns array with a single claim that would be returned by
// newClaim() with the same parameters.
func newClaimArray(name, claimUID, capacity, boundToVolume string, phase v1.PersistentVolumeClaimPhase, class *string, annotations ...string) []*v1.PersistentVolumeClaim {
return []*v1.PersistentVolumeClaim{
newClaim(name, claimUID, capacity, boundToVolume, phase, class, annotations...),
}
}
// claimWithAnnotation saves given annotation into given claims.
// Meant to be used to compose claims specified inline in a test.
func claimWithAnnotation(name, value string, claims []*v1.PersistentVolumeClaim) []*v1.PersistentVolumeClaim {
if claims[0].Annotations == nil {
claims[0].Annotations = map[string]string{name: value}
} else {
claims[0].Annotations[name] = value
}
return claims
}
// claimWithAccessMode saves given access into given claims.
// Meant to be used to compose claims specified inline in a test.
func claimWithAccessMode(modes []v1.PersistentVolumeAccessMode, claims []*v1.PersistentVolumeClaim) []*v1.PersistentVolumeClaim {
claims[0].Spec.AccessModes = modes
return claims
}
func testSyncClaim(ctrl *PersistentVolumeController, reactor *volumeReactor, test controllerTest) error {
return ctrl.syncClaim(test.initialClaims[0])
}
func testSyncClaimError(ctrl *PersistentVolumeController, reactor *volumeReactor, test controllerTest) error {
err := ctrl.syncClaim(test.initialClaims[0])
if err != nil {
return nil
}
return fmt.Errorf("syncClaim succeeded when failure was expected")
}
func testSyncVolume(ctrl *PersistentVolumeController, reactor *volumeReactor, test controllerTest) error {
return ctrl.syncVolume(test.initialVolumes[0])
}
type operationType string
const operationDelete = "Delete"
const operationRecycle = "Recycle"
var (
classGold string = "gold"
classSilver string = "silver"
classEmpty string = ""
classNonExisting string = "non-existing"
classExternal string = "external"
classUnknownInternal string = "unknown-internal"
classUnsupportedMountOptions string = "unsupported-mountoptions"
classLarge string = "large"
classWait string = "wait"
modeWait = storage.VolumeBindingWaitForFirstConsumer
)
// wrapTestWithPluginCalls returns a testCall that:
// - configures controller with a volume plugin that implements recycler,
// deleter and provisioner. The plugin retunrs provided errors when a volume
// is deleted, recycled or provisioned.
// - calls given testCall
func wrapTestWithPluginCalls(expectedRecycleCalls, expectedDeleteCalls []error, expectedProvisionCalls []provisionCall, toWrap testCall) testCall {
return func(ctrl *PersistentVolumeController, reactor *volumeReactor, test controllerTest) error {
plugin := &mockVolumePlugin{
recycleCalls: expectedRecycleCalls,
deleteCalls: expectedDeleteCalls,
provisionCalls: expectedProvisionCalls,
}
ctrl.volumePluginMgr.InitPlugins([]vol.VolumePlugin{plugin}, nil /* prober */, ctrl)
return toWrap(ctrl, reactor, test)
}
}
// wrapTestWithReclaimCalls returns a testCall that:
// - configures controller with recycler or deleter which will return provided
// errors when a volume is deleted or recycled
// - calls given testCall
func wrapTestWithReclaimCalls(operation operationType, expectedOperationCalls []error, toWrap testCall) testCall {
if operation == operationDelete {
return wrapTestWithPluginCalls(nil, expectedOperationCalls, nil, toWrap)
} else {
return wrapTestWithPluginCalls(expectedOperationCalls, nil, nil, toWrap)
}
}
// wrapTestWithProvisionCalls returns a testCall that:
// - configures controller with a provisioner which will return provided errors
// when a claim is provisioned
// - calls given testCall
func wrapTestWithProvisionCalls(expectedProvisionCalls []provisionCall, toWrap testCall) testCall {
return wrapTestWithPluginCalls(nil, nil, expectedProvisionCalls, toWrap)
}
// wrapTestWithInjectedOperation returns a testCall that:
// - starts the controller and lets it run original testCall until
// scheduleOperation() call. It blocks the controller there and calls the
// injected function to simulate that something is happening when the
// controller waits for the operation lock. Controller is then resumed and we
// check how it behaves.
func wrapTestWithInjectedOperation(toWrap testCall, injectBeforeOperation func(ctrl *PersistentVolumeController, reactor *volumeReactor)) testCall {
return func(ctrl *PersistentVolumeController, reactor *volumeReactor, test controllerTest) error {
// Inject a hook before async operation starts