schedulercache: remove bind() from AssumePod

plugin/pkg/scheduler/scheduler.go

@@ -106,7 +106,7 @@ func (s *Scheduler) scheduleOne() {
 	// will self-repair.
 	assumed := *pod
 	assumed.Spec.NodeName = dest
-	s.config.SchedulerCache.AssumePodIfBindSucceed(&assumed, func() bool { return true })
+	s.config.SchedulerCache.AssumePod(&assumed)
 
 	go func() {
 		defer metrics.E2eSchedulingLatency.Observe(metrics.SinceInMicroseconds(start))

plugin/pkg/scheduler/schedulercache/cache.go

@@ -98,19 +98,15 @@ func (cache *schedulerCache) List(selector labels.Selector) ([]*api.Pod, error)
 	return pods, nil
 }
 
-func (cache *schedulerCache) AssumePodIfBindSucceed(pod *api.Pod, bind func() bool) error {
+func (cache *schedulerCache) AssumePod(pod *api.Pod) error {
-	return cache.assumePodIfBindSucceed(pod, bind, time.Now())
+	return cache.assumePod(pod, time.Now())
 }
 
-// assumePodScheduled exists for making test deterministic by taking time as input argument.
+// assumePod exists for making test deterministic by taking time as input argument.
-func (cache *schedulerCache) assumePodIfBindSucceed(pod *api.Pod, bind func() bool, now time.Time) error {
+func (cache *schedulerCache) assumePod(pod *api.Pod, now time.Time) error {
 	cache.mu.Lock()
 	defer cache.mu.Unlock()
 
-	if !bind() {
-		return nil
-	}
-
 	key, err := getPodKey(pod)
 	if err != nil {
 		return err

plugin/pkg/scheduler/schedulercache/cache_test.go

@@ -87,8 +87,8 @@ func TestAssumePodScheduled(t *testing.T) {
 	for i, tt := range tests {
 		cache := newSchedulerCache(time.Second, time.Second, nil)
 		for _, pod := range tt.pods {
-			if err := cache.AssumePodIfBindSucceed(pod, alwaysTrue); err != nil {
+			if err := cache.AssumePod(pod); err != nil {
-				t.Fatalf("AssumePodScheduled failed: %v", err)
+				t.Fatalf("AssumePod failed: %v", err)
 			}
 		}
 		n := cache.nodes[nodeName]
@@ -147,7 +147,7 @@ func TestExpirePod(t *testing.T) {
 		cache := newSchedulerCache(ttl, time.Second, nil)
 
 		for _, pod := range tt.pods {
-			if err := cache.assumePodIfBindSucceed(pod.pod, alwaysTrue, pod.assumedTime); err != nil {
+			if err := cache.assumePod(pod.pod, pod.assumedTime); err != nil {
 				t.Fatalf("assumePod failed: %v", err)
 			}
 		}
@@ -195,7 +195,7 @@ func TestAddPodWillConfirm(t *testing.T) {
 	for i, tt := range tests {
 		cache := newSchedulerCache(ttl, time.Second, nil)
 		for _, podToAssume := range tt.podsToAssume {
-			if err := cache.assumePodIfBindSucceed(podToAssume, alwaysTrue, now); err != nil {
+			if err := cache.assumePod(podToAssume, now); err != nil {
 				t.Fatalf("assumePod failed: %v", err)
 			}
 		}
@@ -240,7 +240,7 @@ func TestAddPodAfterExpiration(t *testing.T) {
 	now := time.Now()
 	for i, tt := range tests {
 		cache := newSchedulerCache(ttl, time.Second, nil)
-		if err := cache.assumePodIfBindSucceed(tt.pod, alwaysTrue, now); err != nil {
+		if err := cache.assumePod(tt.pod, now); err != nil {
 			t.Fatalf("assumePod failed: %v", err)
 		}
 		cache.cleanupAssumedPods(now.Add(2 * ttl))
@@ -369,7 +369,7 @@ func TestExpireAddUpdatePod(t *testing.T) {
 	for _, tt := range tests {
 		cache := newSchedulerCache(ttl, time.Second, nil)
 		for _, podToAssume := range tt.podsToAssume {
-			if err := cache.assumePodIfBindSucceed(podToAssume, alwaysTrue, now); err != nil {
+			if err := cache.assumePod(podToAssume, now); err != nil {
 				t.Fatalf("assumePod failed: %v", err)
 			}
 		}
@@ -527,14 +527,10 @@ func setupCacheWithAssumedPods(b *testing.B, podNum int, assumedTime time.Time)
 		objName := fmt.Sprintf("%s-pod-%d", nodeName, i%10)
 		pod := makeBasePod(nodeName, objName, "0", "0", nil)
 
-		err := cache.assumePodIfBindSucceed(pod, alwaysTrue, assumedTime)
+		err := cache.assumePod(pod, assumedTime)
 		if err != nil {
-			b.Fatalf("assumePodIfBindSucceed failed: %v", err)
+			b.Fatalf("assumePod failed: %v", err)
 		}
 	}
 	return cache
 }
-
-func alwaysTrue() bool {
-	return true
-}

plugin/pkg/scheduler/schedulercache/interface.go

@@ -56,14 +56,10 @@ import (
 // - Both "Expired" and "Deleted" are valid end states. In case of some problems, e.g. network issue,
 //   a pod might have changed its state (e.g. added and deleted) without delivering notification to the cache.
 type Cache interface {
-	// AssumePodIfBindSucceed assumes a pod to be scheduled if binding the pod succeeded.
+	// AssumePod assumes a pod scheduled and aggregates the pod's information into its node.
-	// If binding return true, the pod's information is aggregated into designated node.
-	// Note that both binding and assuming are done as one atomic operation from cache's view.
-	// No other events like Add would happen in between binding and assuming.
-	// We are passing the binding function and let implementation take care of concurrency control details.
 	// The implementation also decides the policy to expire pod before being confirmed (receiving Add event).
 	// After expiration, its information would be subtracted.
-	AssumePodIfBindSucceed(pod *api.Pod, bind func() bool) error
+	AssumePod(pod *api.Pod) error
 
 	// AddPod either confirms a pod if it's assumed, or adds it back if it's expired.
 	// If added back, the pod's information would be added again.

plugin/pkg/scheduler/testing/fake_cache.go

@@ -27,10 +27,7 @@ type FakeCache struct {
 	AssumeFunc func(*api.Pod)
 }
 
-func (f *FakeCache) AssumePodIfBindSucceed(pod *api.Pod, bind func() bool) error {
+func (f *FakeCache) AssumePod(pod *api.Pod) error {
-	if !bind() {
-		return nil
-	}
 	f.AssumeFunc(pod)
 	return nil
 }

plugin/pkg/scheduler/testing/pods_to_cache.go

@@ -25,10 +25,7 @@ import (
 // PodsToCache is used for testing
 type PodsToCache []*api.Pod
 
-func (p PodsToCache) AssumePodIfBindSucceed(pod *api.Pod, bind func() bool) error {
+func (p PodsToCache) AssumePod(pod *api.Pod) error {
-	if !bind() {
-		return nil
-	}
 	return nil
 }