// NewPersistentVolumeClaimBinder creates a new PersistentVolumeClaimBinder
func NewPersistentVolumeClaimBinder(qingClient client.Interface, syncPeriod time.Duration) *PersistentVolumeClaimBinder {
volumeIndex := NewPersistentVolumeOrderedIndex()
binderClient := NewBinderClient(qingClient)
binder := &PersistentVolumeClaimBinder{
volumeIndex: volumeIndex,
client: binderClient,
}
_, volumeController := framework.NewInformer(
&cache.ListWatch{
ListFunc: func() (runtime.Object, error) {
return qingClient.PersistentVolumes().List(labels.Everything(), fields.Everything())
},
WatchFunc: func(resourceVersion string) (watch.Interface, error) {
return qingClient.PersistentVolumes().Watch(labels.Everything(), fields.Everything(), resourceVersion)
},
},
&api.PersistentVolume{},
syncPeriod,
framework.ResourceEventHandlerFuncs{
AddFunc: binder.addVolume,
UpdateFunc: binder.updateVolume,
DeleteFunc: binder.deleteVolume,
},
)
_, claimController := framework.NewInformer(
&cache.ListWatch{
ListFunc: func() (runtime.Object, error) {
return qingClient.PersistentVolumeClaims(api.NamespaceAll).List(labels.Everything(), fields.Everything())
},
WatchFunc: func(resourceVersion string) (watch.Interface, error) {
return qingClient.PersistentVolumeClaims(api.NamespaceAll).Watch(labels.Everything(), fields.Everything(), resourceVersion)
},
},
&api.PersistentVolumeClaim{},
syncPeriod,
framework.ResourceEventHandlerFuncs{
AddFunc: binder.addClaim,
UpdateFunc: binder.updateClaim,
// no DeleteFunc needed. a claim requires no clean-up.
// syncVolume handles the missing claim
},
)
binder.claimController = claimController
binder.volumeController = volumeController
return binder
}
// NewNamespaceManager creates a new NamespaceManager
func NewNamespaceManager(qingClient client.Interface, resyncPeriod time.Duration) *NamespaceManager {
_, controller := framework.NewInformer(
&cache.ListWatch{
ListFunc: func() (runtime.Object, error) {
return qingClient.Namespaces().List(labels.Everything(), fields.Everything())
},
WatchFunc: func(resourceVersion string) (watch.Interface, error) {
return qingClient.Namespaces().Watch(labels.Everything(), fields.Everything(), resourceVersion)
},
},
&api.Namespace{},
resyncPeriod,
framework.ResourceEventHandlerFuncs{
AddFunc: func(obj interface{}) {
namespace := obj.(*api.Namespace)
err := syncNamespace(qingClient, *namespace)
if err != nil {
glog.Error(err)
}
},
UpdateFunc: func(oldObj, newObj interface{}) {
namespace := newObj.(*api.Namespace)
err := syncNamespace(qingClient, *namespace)
if err != nil {
glog.Error(err)
}
},
},
)
return &NamespaceManager{
controller: controller,
}
}
// NewEndpointController returns a new *EndpointController.
func NewEndpointController(client *client.Client) *EndpointController {
e := &EndpointController{
client: client,
queue: workqueue.New(),
}
e.serviceStore.Store, e.serviceController = framework.NewInformer(
&cache.ListWatch{
ListFunc: func() (runtime.Object, error) {
return e.client.Services(api.NamespaceAll).List(labels.Everything())
},
WatchFunc: func(rv string) (watch.Interface, error) {
return e.client.Services(api.NamespaceAll).Watch(labels.Everything(), fields.Everything(), rv)
},
},
&api.Service{},
FullServiceResyncPeriod,
framework.ResourceEventHandlerFuncs{
AddFunc: e.enqueueService,
UpdateFunc: func(old, cur interface{}) {
e.enqueueService(cur)
},
DeleteFunc: e.enqueueService,
},
)
e.podStore.Store, e.podController = framework.NewInformer(
&cache.ListWatch{
ListFunc: func() (runtime.Object, error) {
return e.client.Pods(api.NamespaceAll).List(labels.Everything(), fields.Everything())
},
WatchFunc: func(rv string) (watch.Interface, error) {
return e.client.Pods(api.NamespaceAll).Watch(labels.Everything(), fields.Everything(), rv)
},
},
&api.Pod{},
PodRelistPeriod,
framework.ResourceEventHandlerFuncs{
AddFunc: e.addPod,
UpdateFunc: e.updatePod,
DeleteFunc: e.deletePod,
},
)
return e
}
func ExampleInformer() {
// source simulates an apiserver object endpoint.
source := framework.NewFakeControllerSource()
// Let's do threadsafe output to get predictable test results.
deletionCounter := make(chan string, 1000)
// Make a controller that immediately deletes anything added to it, and
// logs anything deleted.
_, controller := framework.NewInformer(
source,
&api.Pod{},
time.Millisecond*100,
framework.ResourceEventHandlerFuncs{
AddFunc: func(obj interface{}) {
source.Delete(obj.(runtime.Object))
},
DeleteFunc: func(obj interface{}) {
key, err := framework.DeletionHandlingMetaNamespaceKeyFunc(obj)
if err != nil {
key = "oops something went wrong with the key"
}
// Report this deletion.
deletionCounter <- key
},
},
)
// Run the controller and run it until we close stop.
stop := make(chan struct{})
defer close(stop)
go controller.Run(stop)
// Let's add a few objects to the source.
testIDs := []string{"a-hello", "b-controller", "c-framework"}
for _, name := range testIDs {
// Note that these pods are not valid-- the fake source doesn't
// call validation or anything.
source.Add(&api.Pod{ObjectMeta: api.ObjectMeta{Name: name}})
}
// Let's wait for the controller to process the things we just added.
outputSet := util.StringSet{}
for i := 0; i < len(testIDs); i++ {
outputSet.Insert(<-deletionCounter)
}
for _, key := range outputSet.List() {
fmt.Println(key)
}
// Output:
// a-hello
// b-controller
// c-framework
}
func watchForServices(qingClient *kclient.Client, ks *qing2sky) kcache.Store {
serviceStore, serviceController := kframework.NewInformer(
createServiceLW(qingClient),
&kapi.Service{},
resyncPeriod,
kframework.ResourceEventHandlerFuncs{
AddFunc: ks.newService,
DeleteFunc: ks.removeService,
UpdateFunc: ks.updateService,
},
)
go serviceController.Run(util.NeverStop)
return serviceStore
}
func watchEndpoints(qingClient *kclient.Client, ks *qing2sky) kcache.Store {
eStore, eController := kframework.NewInformer(
createEndpointsLW(qingClient),
&kapi.Endpoints{},
resyncPeriod,
kframework.ResourceEventHandlerFuncs{
AddFunc: ks.handleEndpointAdd,
UpdateFunc: func(oldObj, newObj interface{}) {
// TODO: Avoid unwanted updates.
ks.handleEndpointAdd(newObj)
},
},
)
go eController.Run(util.NeverStop)
return eStore
}
// Initializes the factory.
func NewConfigFactory(client *client.Client) *ConfigFactory {
c := &ConfigFactory{
Client: client,
PodQueue: cache.NewFIFO(cache.MetaNamespaceKeyFunc),
ScheduledPodLister: &cache.StoreToPodLister{},
// Only nodes in the "Ready" condition with status == "True" are schedulable
NodeLister: &cache.StoreToNodeLister{cache.NewStore(cache.MetaNamespaceKeyFunc)},
ServiceLister: &cache.StoreToServiceLister{cache.NewStore(cache.MetaNamespaceKeyFunc)},
StopEverything: make(chan struct{}),
}
modeler := scheduler.NewSimpleModeler(&cache.StoreToPodLister{c.PodQueue}, c.ScheduledPodLister)
c.modeler = modeler
c.PodLister = modeler.PodLister()
c.BindPodsRateLimiter = util.NewTokenBucketRateLimiter(BindPodsQps, BindPodsBurst)
// On add/delete to the scheduled pods, remove from the assumed pods.
// We construct this here instead of in CreateFromKeys because
// ScheduledPodLister is something we provide to plug in functions that
// they may need to call.
c.ScheduledPodLister.Store, c.scheduledPodPopulator = framework.NewInformer(
c.createAssignedPodLW(),
&api.Pod{},
0,
framework.ResourceEventHandlerFuncs{
AddFunc: func(obj interface{}) {
if pod, ok := obj.(*api.Pod); ok {
c.modeler.LockedAction(func() {
c.modeler.ForgetPod(pod)
})
}
},
DeleteFunc: func(obj interface{}) {
c.modeler.LockedAction(func() {
switch t := obj.(type) {
case *api.Pod:
c.modeler.ForgetPod(t)
case cache.DeletedFinalStateUnknown:
c.modeler.ForgetPodByKey(t.Key)
}
})
},
},
)
return c
}
// PersistentVolumeRecycler creates a new PersistentVolumeRecycler
func NewPersistentVolumeRecycler(qingClient client.Interface, syncPeriod time.Duration, plugins []volume.VolumePlugin) (*PersistentVolumeRecycler, error) {
recyclerClient := NewRecyclerClient(qingClient)
recycler := &PersistentVolumeRecycler{
client: recyclerClient,
qingClient: qingClient,
}
if err := recycler.pluginMgr.InitPlugins(plugins, recycler); err != nil {
return nil, fmt.Errorf("Could not initialize volume plugins for PVClaimBinder: %+v", err)
}
_, volumeController := framework.NewInformer(
&cache.ListWatch{
ListFunc: func() (runtime.Object, error) {
return qingClient.PersistentVolumes().List(labels.Everything(), fields.Everything())
},
WatchFunc: func(resourceVersion string) (watch.Interface, error) {
return qingClient.PersistentVolumes().Watch(labels.Everything(), fields.Everything(), resourceVersion)
},
},
&api.PersistentVolume{},
syncPeriod,
framework.ResourceEventHandlerFuncs{
AddFunc: func(obj interface{}) {
pv := obj.(*api.PersistentVolume)
recycler.reclaimVolume(pv)
},
UpdateFunc: func(oldObj, newObj interface{}) {
pv := newObj.(*api.PersistentVolume)
recycler.reclaimVolume(pv)
},
},
)
recycler.volumeController = volumeController
return recycler, nil
}
PollInterval: itArg.interval,
PodStatusFile: fileHndl,
Replicas: totalPods,
}
// Create a listener for events.
events := make([](*api.Event), 0)
_, controller := framework.NewInformer(
&cache.ListWatch{
ListFunc: func() (runtime.Object, error) {
return c.Events(ns).List(labels.Everything(), fields.Everything())
},
WatchFunc: func(rv string) (watch.Interface, error) {
return c.Events(ns).Watch(labels.Everything(), fields.Everything(), rv)
},
},
&api.Event{},
0,
framework.ResourceEventHandlerFuncs{
AddFunc: func(obj interface{}) {
events = append(events, obj.(*api.Event))
},
},
)
stop := make(chan struct{})
go controller.Run(stop)
// Start the replication controller.
startTime := time.Now()
expectNoError(RunRC(config))
e2eStartupTime := time.Now().Sub(startTime)
func TestUpdate(t *testing.T) {
// This test is going to exercise the various paths that result in a
// call to update.
// source simulates an apiserver object endpoint.
source := framework.NewFakeControllerSource()
const (
FROM = "from"
ADD_MISSED = "missed the add event"
TO = "to"
)
// These are the transitions we expect to see; because this is
// asynchronous, there are a lot of valid possibilities.
type pair struct{ from, to string }
allowedTransitions := map[pair]bool{
pair{FROM, TO}: true,
pair{FROM, ADD_MISSED}: true,
pair{ADD_MISSED, TO}: true,
// Because a resync can happen when we've already observed one
// of the above but before the item is deleted.
pair{TO, TO}: true,
// Because a resync could happen before we observe an update.
pair{FROM, FROM}: true,
}
var testDoneWG sync.WaitGroup
// Make a controller that deletes things once it observes an update.
// It calls Done() on the wait group on deletions so we can tell when
// everything we've added has been deleted.
_, controller := framework.NewInformer(
source,
&api.Pod{},
time.Millisecond*1,
framework.ResourceEventHandlerFuncs{
UpdateFunc: func(oldObj, newObj interface{}) {
o, n := oldObj.(*api.Pod), newObj.(*api.Pod)
from, to := o.Labels["check"], n.Labels["check"]
if !allowedTransitions[pair{from, to}] {
t.Errorf("observed transition %q -> %q for %v", from, to, n.Name)
}
source.Delete(n)
},
DeleteFunc: func(obj interface{}) {
testDoneWG.Done()
},
},
)
// Run the controller and run it until we close stop.
stop := make(chan struct{})
go controller.Run(stop)
pod := func(name, check string) *api.Pod {
return &api.Pod{
ObjectMeta: api.ObjectMeta{
Name: name,
Labels: map[string]string{"check": check},
},
}
}
tests := []func(string){
func(name string) {
name = "a-" + name
source.Add(pod(name, FROM))
source.Modify(pod(name, TO))
},
func(name string) {
name = "b-" + name
source.Add(pod(name, FROM))
source.ModifyDropWatch(pod(name, TO))
},
func(name string) {
name = "c-" + name
source.AddDropWatch(pod(name, FROM))
source.Modify(pod(name, ADD_MISSED))
source.Modify(pod(name, TO))
},
func(name string) {
name = "d-" + name
source.Add(pod(name, FROM))
},
}
// run every test a few times, in parallel
const threads = 3
var wg sync.WaitGroup
wg.Add(threads * len(tests))
testDoneWG.Add(threads * len(tests))
for i := 0; i < threads; i++ {
for j, f := range tests {
go func(name string, f func(string)) {
defer wg.Done()
f(name)
}(fmt.Sprintf("%v-%v", i, j), f)
}
}
wg.Wait()
// Let's wait for the controller to process the things we just added.
testDoneWG.Wait()
close(stop)
}
func TestHammerController(t *testing.T) {
// This test executes a bunch of requests through the fake source and
// controller framework to make sure there's no locking/threading
// errors. If an error happens, it should hang forever or trigger the
// race detector.
// source simulates an apiserver object endpoint.
source := framework.NewFakeControllerSource()
// Let's do threadsafe output to get predictable test results.
outputSetLock := sync.Mutex{}
// map of key to operations done on the key
outputSet := map[string][]string{}
recordFunc := func(eventType string, obj interface{}) {
key, err := framework.DeletionHandlingMetaNamespaceKeyFunc(obj)
if err != nil {
t.Errorf("something wrong with key: %v", err)
key = "oops something went wrong with the key"
}
// Record some output when items are deleted.
outputSetLock.Lock()
defer outputSetLock.Unlock()
outputSet[key] = append(outputSet[key], eventType)
}
// Make a controller which just logs all the changes it gets.
_, controller := framework.NewInformer(
source,
&api.Pod{},
time.Millisecond*100,
framework.ResourceEventHandlerFuncs{
AddFunc: func(obj interface{}) { recordFunc("add", obj) },
UpdateFunc: func(oldObj, newObj interface{}) { recordFunc("update", newObj) },
DeleteFunc: func(obj interface{}) { recordFunc("delete", obj) },
},
)
if controller.HasSynced() {
t.Errorf("Expected HasSynced() to return false before we started the controller")
}
// Run the controller and run it until we close stop.
stop := make(chan struct{})
go controller.Run(stop)
// Let's wait for the controller to do its initial sync
time.Sleep(100 * time.Millisecond)
if !controller.HasSynced() {
t.Errorf("Expected HasSynced() to return true after the initial sync")
}
wg := sync.WaitGroup{}
const threads = 3
wg.Add(threads)
for i := 0; i < threads; i++ {
go func() {
defer wg.Done()
// Let's add a few objects to the source.
currentNames := util.StringSet{}
rs := rand.NewSource(rand.Int63())
f := fuzz.New().NilChance(.5).NumElements(0, 2).RandSource(rs)
r := rand.New(rs) // Mustn't use r and f concurrently!
for i := 0; i < 100; i++ {
var name string
var isNew bool
if currentNames.Len() == 0 || r.Intn(3) == 1 {
f.Fuzz(&name)
isNew = true
} else {
l := currentNames.List()
name = l[r.Intn(len(l))]
}
pod := &api.Pod{}
f.Fuzz(pod)
pod.ObjectMeta.Name = name
pod.ObjectMeta.Namespace = "default"
// Add, update, or delete randomly.
// Note that these pods are not valid-- the fake source doesn't
// call validation or perform any other checking.
if isNew {
currentNames.Insert(name)
source.Add(pod)
continue
}
switch r.Intn(2) {
case 0:
currentNames.Insert(name)
source.Modify(pod)
case 1:
currentNames.Delete(name)
source.Delete(pod)
}
}
}()
}
wg.Wait()
// Let's wait for the controller to finish processing the things we just added.
time.Sleep(100 * time.Millisecond)
close(stop)
outputSetLock.Lock()
t.Logf("got: %#v", outputSet)
}
// NewReplicationManager creates a new ReplicationManager.
func NewReplicationManager(qingClient client.Interface, burstReplicas int) *ReplicationManager {
eventBroadcaster := record.NewBroadcaster()
eventBroadcaster.StartLogging(glog.Infof)
eventBroadcaster.StartRecordingToSink(qingClient.Events(""))
rm := &ReplicationManager{
qingClient: qingClient,
podControl: RealPodControl{
qingClient: qingClient,
recorder: eventBroadcaster.NewRecorder(api.EventSource{Component: "replication-controller"}),
},
burstReplicas: burstReplicas,
expectations: NewRCExpectations(),
queue: workqueue.New(),
}
rm.controllerStore.Store, rm.rcController = framework.NewInformer(
&cache.ListWatch{
ListFunc: func() (runtime.Object, error) {
return rm.qingClient.ReplicationControllers(api.NamespaceAll).List(labels.Everything())
},
WatchFunc: func(rv string) (watch.Interface, error) {
return rm.qingClient.ReplicationControllers(api.NamespaceAll).Watch(labels.Everything(), fields.Everything(), rv)
},
},
&api.ReplicationController{},
FullControllerResyncPeriod,
framework.ResourceEventHandlerFuncs{
AddFunc: rm.enqueueController,
UpdateFunc: func(old, cur interface{}) {
// We only really need to do this when spec changes, but for correctness it is safer to
// periodically double check. It is overkill for 2 reasons:
// 1. Status.Replica updates will cause a sync
// 2. Every 30s we will get a full resync (this will happen anyway every 5 minutes when pods relist)
// However, it shouldn't be that bad as rcs that haven't met expectations won't sync, and all
// the listing is done using local stores.
oldRC := old.(*api.ReplicationController)
curRC := cur.(*api.ReplicationController)
if oldRC.Status.Replicas != curRC.Status.Replicas {
glog.V(4).Infof("Observed updated replica count for rc: %v, %d->%d", curRC.Name, oldRC.Status.Replicas, curRC.Status.Replicas)
}
rm.enqueueController(cur)
},
// This will enter the sync loop and no-op, becuase the controller has been deleted from the store.
// Note that deleting a controller immediately after scaling it to 0 will not work. The recommended
// way of achieving this is by performing a `stop` operation on the controller.
DeleteFunc: rm.enqueueController,
},
)
rm.podStore.Store, rm.podController = framework.NewInformer(
&cache.ListWatch{
ListFunc: func() (runtime.Object, error) {
return rm.qingClient.Pods(api.NamespaceAll).List(labels.Everything(), fields.Everything())
},
WatchFunc: func(rv string) (watch.Interface, error) {
return rm.qingClient.Pods(api.NamespaceAll).Watch(labels.Everything(), fields.Everything(), rv)
},
},
&api.Pod{},
PodRelistPeriod,
framework.ResourceEventHandlerFuncs{
AddFunc: rm.addPod,
// This invokes the rc for every pod change, eg: host assignment. Though this might seem like overkill
// the most frequent pod update is status, and the associated rc will only list from local storage, so
// it should be ok.
UpdateFunc: rm.updatePod,
DeleteFunc: rm.deletePod,
},
)
rm.syncHandler = rm.syncReplicationController
rm.podStoreSynced = rm.podController.HasSynced
return rm
}
