One lock among PodNominator and SchedulingQueue

Change-Id: I17fe5da40250e42c04124c25b530ce6c8dea4154

pkg/scheduler/framework/interface.go

@@ -573,6 +573,9 @@ type Framework interface {
 
 	// ProfileName returns the profile name associated to this framework.
 	ProfileName() string
+
+	// SetPodNominator sets the PodNominator
+	SetPodNominator(nominator PodNominator)
 }
 
 // Handle provides data and some tools that plugins can use. It is

pkg/scheduler/framework/runtime/framework.go

@@ -363,6 +363,10 @@ func NewFramework(r Registry, profile *config.KubeSchedulerProfile, stopCh <-cha
 	return f, nil
 }
 
+func (f *frameworkImpl) SetPodNominator(n framework.PodNominator) {
+	f.PodNominator = n
+}
+
 // getScoreWeights makes sure that, between MultiPoint-Score plugin weights and individual Score
 // plugin weights there is not an overflow of MaxTotalScore.
 func getScoreWeights(f *frameworkImpl, pluginsMap map[string]framework.Plugin, plugins []config.Plugin) error {

pkg/scheduler/internal/queue/scheduling_queue.go

@@ -33,7 +33,6 @@ import (
 	"time"
 
 	v1 "k8s.io/api/core/v1"
-	"k8s.io/apimachinery/pkg/labels"
 	"k8s.io/apimachinery/pkg/types"
 	"k8s.io/apimachinery/pkg/util/sets"
 	"k8s.io/apimachinery/pkg/util/wait"
@@ -133,8 +132,7 @@ func NominatedNodeName(pod *v1.Pod) string {
 //   - unschedulablePods holds pods that were already attempted for scheduling and
 //     are currently determined to be unschedulable.
 type PriorityQueue struct {
-	// PodNominator abstracts the operations to maintain nominated Pods.
-	framework.PodNominator
+	*nominator
 
 	stop  chan struct{}
 	clock clock.Clock
@@ -146,7 +144,6 @@ type PriorityQueue struct {
 	// the maximum time a pod can stay in the unschedulablePods.
 	podMaxInUnschedulablePodsDuration time.Duration
 
-	lock sync.RWMutex
 	cond sync.Cond
 
 	// activeQ is heap structure that scheduler actively looks at to find pods to
@@ -180,7 +177,7 @@ type priorityQueueOptions struct {
 	podInitialBackoffDuration         time.Duration
 	podMaxBackoffDuration             time.Duration
 	podMaxInUnschedulablePodsDuration time.Duration
-	podNominator                      framework.PodNominator
+	podLister                         listersv1.PodLister
 	clusterEventMap                   map[framework.ClusterEvent]sets.String
 }
 
@@ -208,10 +205,10 @@ func WithPodMaxBackoffDuration(duration time.Duration) Option {
 	}
 }
 
-// WithPodNominator sets pod nominator for PriorityQueue.
-func WithPodNominator(pn framework.PodNominator) Option {
+// WithPodLister sets pod lister for PriorityQueue.
+func WithPodLister(pl listersv1.PodLister) Option {
 	return func(o *priorityQueueOptions) {
-		o.podNominator = pn
+		o.podLister = pl
 	}
 }
 
@@ -256,6 +253,9 @@ func NewPriorityQueue(
 	opts ...Option,
 ) *PriorityQueue {
 	options := defaultPriorityQueueOptions
+	if options.podLister == nil {
+		options.podLister = informerFactory.Core().V1().Pods().Lister()
+	}
 	for _, opt := range opts {
 		opt(&options)
 	}
@@ -266,12 +266,8 @@ func NewPriorityQueue(
 		return lessFn(pInfo1, pInfo2)
 	}
 
-	if options.podNominator == nil {
-		options.podNominator = NewPodNominator(informerFactory.Core().V1().Pods().Lister())
-	}
-
 	pq := &PriorityQueue{
-		PodNominator:                      options.podNominator,
+		nominator:                         newPodNominator(options.podLister),
 		clock:                             options.clock,
 		stop:                              make(chan struct{}),
 		podInitialBackoffDuration:         options.podInitialBackoffDuration,
@@ -314,7 +310,7 @@ func (p *PriorityQueue) Add(pod *v1.Pod) error {
 		klog.ErrorS(nil, "Error: pod is already in the podBackoff queue", "pod", klog.KObj(pod))
 	}
 	metrics.SchedulerQueueIncomingPods.WithLabelValues("active", PodAdd).Inc()
-	p.PodNominator.AddNominatedPod(pInfo.PodInfo, nil)
+	p.addNominatedPodUnlocked(pInfo.PodInfo, nil)
 	p.cond.Broadcast()
 
 	return nil
@@ -368,7 +364,7 @@ func (p *PriorityQueue) activate(pod *v1.Pod) bool {
 	p.unschedulablePods.delete(pod)
 	p.podBackoffQ.Delete(pInfo)
 	metrics.SchedulerQueueIncomingPods.WithLabelValues("active", ForceActivate).Inc()
-	p.PodNominator.AddNominatedPod(pInfo.PodInfo, nil)
+	p.addNominatedPodUnlocked(pInfo.PodInfo, nil)
 	return true
 }
 
@@ -424,7 +420,7 @@ func (p *PriorityQueue) AddUnschedulableIfNotPresent(pInfo *framework.QueuedPodI
 
 	}
 
-	p.PodNominator.AddNominatedPod(pInfo.PodInfo, nil)
+	p.addNominatedPodUnlocked(pInfo.PodInfo, nil)
 	return nil
 }
 
@@ -531,22 +527,22 @@ func (p *PriorityQueue) Update(oldPod, newPod *v1.Pod) error {
 		// If the pod is already in the active queue, just update it there.
 		if oldPodInfo, exists, _ := p.activeQ.Get(oldPodInfo); exists {
 			pInfo := updatePod(oldPodInfo, newPod)
-			p.PodNominator.UpdateNominatedPod(oldPod, pInfo.PodInfo)
+			p.updateNominatedPodUnlocked(oldPod, pInfo.PodInfo)
 			return p.activeQ.Update(pInfo)
 		}
 
 		// If the pod is in the backoff queue, update it there.
 		if oldPodInfo, exists, _ := p.podBackoffQ.Get(oldPodInfo); exists {
 			pInfo := updatePod(oldPodInfo, newPod)
-			p.PodNominator.UpdateNominatedPod(oldPod, pInfo.PodInfo)
+			p.updateNominatedPodUnlocked(oldPod, pInfo.PodInfo)
 			return p.podBackoffQ.Update(pInfo)
 		}
 	}
 
 	// If the pod is in the unschedulable queue, updating it may make it schedulable.
 	if usPodInfo := p.unschedulablePods.get(newPod); usPodInfo != nil {
 		pInfo := updatePod(usPodInfo, newPod)
-		p.PodNominator.UpdateNominatedPod(oldPod, pInfo.PodInfo)
+		p.updateNominatedPodUnlocked(oldPod, pInfo.PodInfo)
 		if isPodUpdated(oldPod, newPod) {
 			if p.isPodBackingoff(usPodInfo) {
 				if err := p.podBackoffQ.Add(pInfo); err != nil {
@@ -572,7 +568,7 @@ func (p *PriorityQueue) Update(oldPod, newPod *v1.Pod) error {
 	if err := p.activeQ.Add(pInfo); err != nil {
 		return err
 	}
-	p.PodNominator.AddNominatedPod(pInfo.PodInfo, nil)
+	p.addNominatedPodUnlocked(pInfo.PodInfo, nil)
 	p.cond.Broadcast()
 	return nil
 }
@@ -582,7 +578,7 @@ func (p *PriorityQueue) Update(oldPod, newPod *v1.Pod) error {
 func (p *PriorityQueue) Delete(pod *v1.Pod) error {
 	p.lock.Lock()
 	defer p.lock.Unlock()
-	p.PodNominator.DeleteNominatedPodIfExists(pod)
+	p.deleteNominatedPodIfExistsUnlocked(pod)
 	if err := p.activeQ.Delete(newQueuedPodInfoForLookup(pod)); err != nil {
 		// The item was probably not found in the activeQ.
 		p.podBackoffQ.Delete(newQueuedPodInfoForLookup(pod))
@@ -662,8 +658,7 @@ func (p *PriorityQueue) movePodsToActiveOrBackoffQueue(podInfoList []*framework.
 // any affinity term that matches "pod".
 // NOTE: this function assumes lock has been acquired in caller.
 func (p *PriorityQueue) getUnschedulablePodsWithMatchingAffinityTerm(pod *v1.Pod) []*framework.QueuedPodInfo {
-	var nsLabels labels.Set
-	nsLabels = interpodaffinity.GetNamespaceLabelsSnapshot(pod.Namespace, p.nsLister)
+	nsLabels := interpodaffinity.GetNamespaceLabelsSnapshot(pod.Namespace, p.nsLister)
 
 	var podsToMove []*framework.QueuedPodInfo
 	for _, pInfo := range p.unschedulablePods.podInfoMap {
@@ -707,26 +702,30 @@ func (p *PriorityQueue) Close() {
 
 // DeleteNominatedPodIfExists deletes <pod> from nominatedPods.
 func (npm *nominator) DeleteNominatedPodIfExists(pod *v1.Pod) {
-	npm.Lock()
+	npm.lock.Lock()
+	npm.deleteNominatedPodIfExistsUnlocked(pod)
+	npm.lock.Unlock()
+}
+
+func (npm *nominator) deleteNominatedPodIfExistsUnlocked(pod *v1.Pod) {
 	npm.delete(pod)
-	npm.Unlock()
 }
 
 // AddNominatedPod adds a pod to the nominated pods of the given node.
 // This is called during the preemption process after a node is nominated to run
 // the pod. We update the structure before sending a request to update the pod
 // object to avoid races with the following scheduling cycles.
 func (npm *nominator) AddNominatedPod(pi *framework.PodInfo, nominatingInfo *framework.NominatingInfo) {
-	npm.Lock()
-	npm.add(pi, nominatingInfo)
-	npm.Unlock()
+	npm.lock.Lock()
+	npm.addNominatedPodUnlocked(pi, nominatingInfo)
+	npm.lock.Unlock()
 }
 
 // NominatedPodsForNode returns a copy of pods that are nominated to run on the given node,
 // but they are waiting for other pods to be removed from the node.
 func (npm *nominator) NominatedPodsForNode(nodeName string) []*framework.PodInfo {
-	npm.RLock()
-	defer npm.RUnlock()
+	npm.lock.RLock()
+	defer npm.lock.RUnlock()
 	// Make a copy of the nominated Pods so the caller can mutate safely.
 	pods := make([]*framework.PodInfo, len(npm.nominatedPods[nodeName]))
 	for i := 0; i < len(pods); i++ {
@@ -852,10 +851,10 @@ type nominator struct {
 	// nominated.
 	nominatedPodToNode map[types.UID]string
 
-	sync.RWMutex
+	lock sync.RWMutex
 }
 
-func (npm *nominator) add(pi *framework.PodInfo, nominatingInfo *framework.NominatingInfo) {
+func (npm *nominator) addNominatedPodUnlocked(pi *framework.PodInfo, nominatingInfo *framework.NominatingInfo) {
 	// Always delete the pod if it already exists, to ensure we never store more than
 	// one instance of the pod.
 	npm.delete(pi.Pod)
@@ -912,8 +911,12 @@ func (npm *nominator) delete(p *v1.Pod) {
 
 // UpdateNominatedPod updates the <oldPod> with <newPod>.
 func (npm *nominator) UpdateNominatedPod(oldPod *v1.Pod, newPodInfo *framework.PodInfo) {
-	npm.Lock()
-	defer npm.Unlock()
+	npm.lock.Lock()
+	defer npm.lock.Unlock()
+	npm.updateNominatedPodUnlocked(oldPod, newPodInfo)
+}
+
+func (npm *nominator) updateNominatedPodUnlocked(oldPod *v1.Pod, newPodInfo *framework.PodInfo) {
 	// In some cases, an Update event with no "NominatedNode" present is received right
 	// after a node("NominatedNode") is reserved for this pod in memory.
 	// In this case, we need to keep reserving the NominatedNode when updating the pod pointer.
@@ -934,13 +937,17 @@ func (npm *nominator) UpdateNominatedPod(oldPod *v1.Pod, newPodInfo *framework.P
 	// We update irrespective of the nominatedNodeName changed or not, to ensure
 	// that pod pointer is updated.
 	npm.delete(oldPod)
-	npm.add(newPodInfo, nominatingInfo)
+	npm.addNominatedPodUnlocked(newPodInfo, nominatingInfo)
 }
 
 // NewPodNominator creates a nominator as a backing of framework.PodNominator.
 // A podLister is passed in so as to check if the pod exists
 // before adding its nominatedNode info.
 func NewPodNominator(podLister listersv1.PodLister) framework.PodNominator {
+	return newPodNominator(podLister)
+}
+
+func newPodNominator(podLister listersv1.PodLister) *nominator {
 	return &nominator{
 		podLister:          podLister,
 		nominatedPods:      make(map[string][]*framework.PodInfo),