// Test public interface
func doTestIndex(t *testing.T, indexer Indexer) {
mkObj := func(id string, val string) testStoreObject {
return testStoreObject{id: id, val: val}
}
// Test Index
expected := map[string]sets.String{}
expected["b"] = sets.NewString("a", "c")
expected["f"] = sets.NewString("e")
expected["h"] = sets.NewString("g")
indexer.Add(mkObj("a", "b"))
indexer.Add(mkObj("c", "b"))
indexer.Add(mkObj("e", "f"))
indexer.Add(mkObj("g", "h"))
{
for k, v := range expected {
found := sets.String{}
indexResults, err := indexer.Index("by_val", mkObj("", k))
if err != nil {
t.Errorf("Unexpected error %v", err)
}
for _, item := range indexResults {
found.Insert(item.(testStoreObject).id)
}
items := v.List()
if !found.HasAll(items...) {
t.Errorf("missing items, index %s, expected %v but found %v", k, items, found.List())
}
}
}
}
func ExampleNewInformer() {
// source simulates an apiserver object endpoint.
source := fcache.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 := NewInformer(
source,
&api.Pod{},
time.Millisecond*100,
ResourceEventHandlerFuncs{
AddFunc: func(obj interface{}) {
source.Delete(obj.(runtime.Object))
},
DeleteFunc: func(obj interface{}) {
key, err := 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 := sets.String{}
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
}
// RESTMapper returns a union RESTMapper of all known types with priorities chosen in the following order:
// 1. if KUBE_API_VERSIONS is specified, then KUBE_API_VERSIONS in order, OR
// 1. legacy kube group preferred version, extensions preferred version, metrics perferred version, legacy
// kube any version, extensions any version, metrics any version, all other groups alphabetical preferred version,
// all other groups alphabetical.
func (m *APIRegistrationManager) RESTMapper(versionPatterns ...unversioned.GroupVersion) meta.RESTMapper {
unionMapper := meta.MultiRESTMapper{}
unionedGroups := sets.NewString()
for enabledVersion := range m.enabledVersions {
if !unionedGroups.Has(enabledVersion.Group) {
unionedGroups.Insert(enabledVersion.Group)
groupMeta := m.groupMetaMap[enabledVersion.Group]
unionMapper = append(unionMapper, groupMeta.RESTMapper)
}
}
if len(versionPatterns) != 0 {
resourcePriority := []unversioned.GroupVersionResource{}
kindPriority := []unversioned.GroupVersionKind{}
for _, versionPriority := range versionPatterns {
resourcePriority = append(resourcePriority, versionPriority.WithResource(meta.AnyResource))
kindPriority = append(kindPriority, versionPriority.WithKind(meta.AnyKind))
}
return meta.PriorityRESTMapper{Delegate: unionMapper, ResourcePriority: resourcePriority, KindPriority: kindPriority}
}
if len(m.envRequestedVersions) != 0 {
resourcePriority := []unversioned.GroupVersionResource{}
kindPriority := []unversioned.GroupVersionKind{}
for _, versionPriority := range m.envRequestedVersions {
resourcePriority = append(resourcePriority, versionPriority.WithResource(meta.AnyResource))
kindPriority = append(kindPriority, versionPriority.WithKind(meta.AnyKind))
}
return meta.PriorityRESTMapper{Delegate: unionMapper, ResourcePriority: resourcePriority, KindPriority: kindPriority}
}
prioritizedGroups := []string{"", "extensions", "metrics"}
resourcePriority, kindPriority := m.prioritiesForGroups(prioritizedGroups...)
prioritizedGroupsSet := sets.NewString(prioritizedGroups...)
remainingGroups := sets.String{}
for enabledVersion := range m.enabledVersions {
if !prioritizedGroupsSet.Has(enabledVersion.Group) {
remainingGroups.Insert(enabledVersion.Group)
}
}
remainingResourcePriority, remainingKindPriority := m.prioritiesForGroups(remainingGroups.List()...)
resourcePriority = append(resourcePriority, remainingResourcePriority...)
kindPriority = append(kindPriority, remainingKindPriority...)
return meta.PriorityRESTMapper{Delegate: unionMapper, ResourcePriority: resourcePriority, KindPriority: kindPriority}
}
func Example() {
// source simulates an apiserver object endpoint.
source := fcache.NewFakeControllerSource()
// This will hold the downstream state, as we know it.
downstream := NewStore(DeletionHandlingMetaNamespaceKeyFunc)
// This will hold incoming changes. Note how we pass downstream in as a
// KeyLister, that way resync operations will result in the correct set
// of update/delete deltas.
fifo := NewDeltaFIFO(MetaNamespaceKeyFunc, nil, downstream)
// Let's do threadsafe output to get predictable test results.
deletionCounter := make(chan string, 1000)
cfg := &Config{
Queue: fifo,
ListerWatcher: source,
ObjectType: &api.Pod{},
FullResyncPeriod: time.Millisecond * 100,
RetryOnError: false,
// Let's implement a simple controller that just deletes
// everything that comes in.
Process: func(obj interface{}) error {
// Obj is from the Pop method of the Queue we make above.
newest := obj.(Deltas).Newest()
if newest.Type != Deleted {
// Update our downstream store.
err := downstream.Add(newest.Object)
if err != nil {
return err
}
// Delete this object.
source.Delete(newest.Object.(runtime.Object))
} else {
// Update our downstream store.
err := downstream.Delete(newest.Object)
if err != nil {
return err
}
// fifo's KeyOf is easiest, because it handles
// DeletedFinalStateUnknown markers.
key, err := fifo.KeyOf(newest.Object)
if err != nil {
return err
}
// Report this deletion.
deletionCounter <- key
}
return nil
},
}
// Create the controller and run it until we close stop.
stop := make(chan struct{})
defer close(stop)
go New(cfg).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 := sets.String{}
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 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 := fcache.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 := 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 := NewInformer(
source,
&api.Pod{},
time.Millisecond*100,
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
wait.Poll(100*time.Millisecond, wait.ForeverTestTimeout, func() (bool, error) {
return controller.HasSynced(), nil
})
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 := sets.String{}
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.
// TODO: look in the queue to see how many items need to be processed.
time.Sleep(100 * time.Millisecond)
close(stop)
outputSetLock.Lock()
t.Logf("got: %#v", outputSet)
}