func TestLen(t *testing.T) {
q := workqueue.New()
q.Add("foo")
if e, a := 1, q.Len(); e != a {
t.Errorf("Expected %v, got %v", e, a)
}
q.Add("bar")
if e, a := 2, q.Len(); e != a {
t.Errorf("Expected %v, got %v", e, a)
}
q.Add("foo") // should not increase the queue length.
if e, a := 2, q.Len(); e != a {
t.Errorf("Expected %v, got %v", e, a)
}
}
// 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 TestBasic(t *testing.T) {
// If something is seriously wrong this test will never complete.
q := workqueue.New()
// Start producers
const producers = 50
producerWG := sync.WaitGroup{}
producerWG.Add(producers)
for i := 0; i < producers; i++ {
go func(i int) {
defer producerWG.Done()
for j := 0; j < 50; j++ {
q.Add(i)
time.Sleep(time.Millisecond)
}
}(i)
}
// Start consumers
const consumers = 10
consumerWG := sync.WaitGroup{}
consumerWG.Add(consumers)
for i := 0; i < consumers; i++ {
go func(i int) {
defer consumerWG.Done()
for {
item, quit := q.Get()
if item == "added after shutdown!" {
t.Errorf("Got an item added after shutdown.")
}
if quit {
return
}
t.Logf("Worker %v: begin processing %v", i, item)
time.Sleep(3 * time.Millisecond)
t.Logf("Worker %v: done processing %v", i, item)
q.Done(item)
}
}(i)
}
producerWG.Wait()
q.ShutDown()
q.Add("added after shutdown!")
consumerWG.Wait()
}
func TestAddWhileProcessing(t *testing.T) {
q := workqueue.New()
// Start producers
const producers = 50
producerWG := sync.WaitGroup{}
producerWG.Add(producers)
for i := 0; i < producers; i++ {
go func(i int) {
defer producerWG.Done()
q.Add(i)
}(i)
}
// Start consumers
const consumers = 10
consumerWG := sync.WaitGroup{}
consumerWG.Add(consumers)
for i := 0; i < consumers; i++ {
go func(i int) {
defer consumerWG.Done()
// Every worker will re-add every item up to two times.
// This tests the dirty-while-processing case.
counters := map[interface{}]int{}
for {
item, quit := q.Get()
if quit {
return
}
counters[item]++
if counters[item] < 2 {
q.Add(item)
}
q.Done(item)
}
}(i)
}
producerWG.Wait()
q.ShutDown()
consumerWG.Wait()
}
// 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
}