Add pvc as part of equivalence hash

Use factory to generat get equivalence pod func

plugin/pkg/scheduler/factory/plugins.go

@@ -76,6 +76,9 @@ type PriorityConfigFactory struct {
 	Weight            int
 }
 
+// EquivalencePodFuncFactory produces a function to get equivalence class for given pod.
+type EquivalencePodFuncFactory func(PluginFactoryArgs) algorithm.GetEquivalencePodFunc
+
 var (
 	schedulerFactoryMutex sync.Mutex
 
@@ -90,7 +93,7 @@ var (
 	predicateMetadataProducer PredicateMetadataProducerFactory
 
 	// get equivalence pod function
-	getEquivalencePodFunc algorithm.GetEquivalencePodFunc
+	getEquivalencePodFuncFactory EquivalencePodFuncFactory
 )
 
 const (
@@ -339,8 +342,9 @@ func RegisterCustomPriorityFunction(policy schedulerapi.PriorityPolicy) string {
 	return RegisterPriorityConfigFactory(policy.Name, *pcf)
 }
 
-func RegisterGetEquivalencePodFunction(equivalenceFunc algorithm.GetEquivalencePodFunc) {
-	getEquivalencePodFunc = equivalenceFunc
+// RegisterGetEquivalencePodFunction registers equivalenceFuncFactory to produce equivalence class for given pod.
+func RegisterGetEquivalencePodFunction(equivalenceFuncFactory EquivalencePodFuncFactory) {
+	getEquivalencePodFuncFactory = equivalenceFuncFactory
 }
 
 // IsPriorityFunctionRegistered is useful for testing providers.