Speedup pod affintiy predicate function

plugin/pkg/scheduler/algorithm/predicates/predicates.go

@@ -20,6 +20,7 @@ import (
 	"fmt"
 	"math/rand"
 	"strconv"
+	"sync"
 	"time"
 
 	"github.com/golang/glog"
@@ -29,6 +30,7 @@ import (
 	"k8s.io/kubernetes/pkg/kubelet/qos"
 	"k8s.io/kubernetes/pkg/labels"
 	utilruntime "k8s.io/kubernetes/pkg/util/runtime"
+	"k8s.io/kubernetes/pkg/util/workqueue"
 	"k8s.io/kubernetes/plugin/pkg/scheduler/algorithm"
 	priorityutil "k8s.io/kubernetes/plugin/pkg/scheduler/algorithm/priorities/util"
 	"k8s.io/kubernetes/plugin/pkg/scheduler/schedulercache"
@@ -70,17 +72,28 @@ type predicateMetadata struct {
 	podBestEffort             bool
 	podRequest                *schedulercache.Resource
 	podPorts                  map[int]bool
+	matchingAntiAffinityTerms []matchingPodAntiAffinityTerm
 }
 
-func PredicateMetadata(pod *api.Pod) interface{} {
+type matchingPodAntiAffinityTerm struct {
+	term *api.PodAffinityTerm
+	node *api.Node
+}
+
+func PredicateMetadata(pod *api.Pod, nodeInfoMap map[string]*schedulercache.NodeInfo) interface{} {
+	// If we cannot compute metadata, just return nil
 	if pod == nil {
-		// We cannot compute metadata, just return nil
+		return nil
+	}
+	matchingTerms, err := getMatchingAntiAffinityTerms(pod, nodeInfoMap)
+	if err != nil {
 		return nil
 	}
 	return &predicateMetadata{
 		podBestEffort:             isPodBestEffort(pod),
 		podRequest:                getResourceRequest(pod),
 		podPorts:                  getUsedPorts(pod),
+		matchingAntiAffinityTerms: matchingTerms,
 	}
 }
 
@@ -793,38 +806,33 @@ func NewPodAffinityPredicate(info NodeInfo, podLister algorithm.PodLister, failu
 	return checker.InterPodAffinityMatches
 }
 
-func (checker *PodAffinityChecker) InterPodAffinityMatches(pod *api.Pod, meta interface{}, nodeInfo *schedulercache.NodeInfo) (bool, error) {
+func (c *PodAffinityChecker) InterPodAffinityMatches(pod *api.Pod, meta interface{}, nodeInfo *schedulercache.NodeInfo) (bool, error) {
 	node := nodeInfo.Node()
 	if node == nil {
 		return false, fmt.Errorf("node not found")
 	}
-	allPods, err := checker.podLister.List(labels.Everything())
+	if !c.satisfiesExistingPodsAntiAffinity(pod, meta, node) {
-	if err != nil {
+		return false, nil
-		return false, err
 	}
+
+	// Now check if <pod> requirements will be satisfied on this node.
 	affinity, err := api.GetAffinityFromPodAnnotations(pod.Annotations)
 	if err != nil {
 		return false, err
 	}
-
+	if affinity == nil || (affinity.PodAffinity == nil && affinity.PodAntiAffinity == nil) {
-	// Check if the current node match the inter-pod affinity scheduling constraints.
+		return true, nil
-	// Hard inter-pod affinity is not symmetric, check only when affinity.PodAffinity exists.
-	if affinity != nil && affinity.PodAffinity != nil {
-		if !checker.NodeMatchesHardPodAffinity(pod, allPods, node, affinity.PodAffinity) {
-			return false, ErrPodAffinityNotMatch
 	}
+	if !c.satisfiesPodsAffinityAntiAffinity(pod, node, affinity) {
+		return false, nil
 	}
 
-	// Hard inter-pod anti-affinity is symmetric, we should always check it
+	if glog.V(10) {
-	// (also when affinity or affinity.PodAntiAffinity is nil).
+		// We explicitly don't do glog.V(10).Infof() to avoid computing all the parameters if this is
-	var antiAffinity *api.PodAntiAffinity
+		// not logged. There is visible performance gain from it.
-	if affinity != nil {
+		glog.Infof("Schedule Pod %+v on Node %+v is allowed, pod (anti)affinity constraints satisfied",
-		antiAffinity = affinity.PodAntiAffinity
+			podName(pod), node.Name)
 	}
-	if !checker.NodeMatchesHardPodAntiAffinity(pod, allPods, node, antiAffinity) {
-		return false, ErrPodAffinityNotMatch
-	}
-
 	return true, nil
 }
 
@@ -832,21 +840,20 @@ func (checker *PodAffinityChecker) InterPodAffinityMatches(pod *api.Pod, meta in
 // First return value indicates whether a matching pod exists on a node that matches the topology key,
 // while the second return value indicates whether a matching pod exists anywhere.
 // TODO: Do we really need any pod matching, or all pods matching? I think the latter.
-func (checker *PodAffinityChecker) AnyPodMatchesPodAffinityTerm(pod *api.Pod, allPods []*api.Pod, node *api.Node, podAffinityTerm api.PodAffinityTerm) (bool, bool, error) {
+func (c *PodAffinityChecker) anyPodMatchesPodAffinityTerm(pod *api.Pod, allPods []*api.Pod, node *api.Node, term *api.PodAffinityTerm) (bool, bool, error) {
 	matchingPodExists := false
-	for _, ep := range allPods {
+	for _, existingPod := range allPods {
-		epNode, err := checker.info.GetNodeInfo(ep.Spec.NodeName)
+		match, err := priorityutil.PodMatchesTermsNamespaceAndSelector(existingPod, pod, term)
 		if err != nil {
 			return false, matchingPodExists, err
 		}
-		match, err := priorityutil.PodMatchesTermsNamespaceAndSelector(ep, pod, &podAffinityTerm)
-		if err != nil {
-			return false, matchingPodExists, err
-		}
-
 		if match {
 			matchingPodExists = true
-			if checker.failureDomains.NodesHaveSameTopologyKey(node, epNode, podAffinityTerm.TopologyKey) {
+			existingPodNode, err := c.info.GetNodeInfo(existingPod.Spec.NodeName)
+			if err != nil {
+				return false, matchingPodExists, err
+			}
+			if c.failureDomains.NodesHaveSameTopologyKey(node, existingPodNode, term.TopologyKey) {
 				return true, matchingPodExists, nil
 			}
 		}
@@ -880,87 +887,167 @@ func getPodAntiAffinityTerms(podAntiAffinity *api.PodAntiAffinity) (terms []api.
 	return terms
 }
 
-// Checks whether the given node has pods which satisfy all the required pod affinity scheduling rules.
+func getMatchingAntiAffinityTerms(pod *api.Pod, nodeInfoMap map[string]*schedulercache.NodeInfo) ([]matchingPodAntiAffinityTerm, error) {
-// If node has pods which satisfy all the required pod affinity scheduling rules then return true.
+	allNodeNames := make([]string, 0, len(nodeInfoMap))
-func (checker *PodAffinityChecker) NodeMatchesHardPodAffinity(pod *api.Pod, allPods []*api.Pod, node *api.Node, podAffinity *api.PodAffinity) bool {
+	for name := range nodeInfoMap {
-	for _, podAffinityTerm := range getPodAffinityTerms(podAffinity) {
+		allNodeNames = append(allNodeNames, name)
-		podAffinityTermMatches, matchingPodExists, err := checker.AnyPodMatchesPodAffinityTerm(pod, allPods, node, podAffinityTerm)
-		if err != nil {
-			glog.V(10).Infof("Cannot schedule pod %+v onto node %v, an error ocurred when checking existing pods on the node for PodAffinityTerm %v err: %v",
-				podName(pod), node.Name, podAffinityTerm, err)
-			return false
 	}
 
-		if !podAffinityTermMatches {
+	var lock sync.Mutex
-			// If the requiredDuringScheduling affinity requirement matches a pod's own labels and namespace, and there are no other such pods
+	var result []matchingPodAntiAffinityTerm
-			// anywhere, then disregard the requirement.
+	var firstError error
-			// This allows rules like "schedule all of the pods of this collection to the same zone" to not block forever
+	appendResult := func(toAppend []matchingPodAntiAffinityTerm) {
-			// because the first pod of the collection can't be scheduled.
+		lock.Lock()
-			match, err := priorityutil.PodMatchesTermsNamespaceAndSelector(pod, pod, &podAffinityTerm)
+		defer lock.Unlock()
-			if err != nil || !match || matchingPodExists {
+		result = append(result, toAppend...)
-				glog.V(10).Infof("Cannot schedule pod %+v onto node %v, because none of the existing pods on this node satisfy the PodAffinityTerm %v, err: %+v",
+	}
-					podName(pod), node.Name, podAffinityTerm, err)
+	catchError := func(err error) {
+		lock.Lock()
+		defer lock.Unlock()
+		if firstError == nil {
+			firstError = err
+		}
+	}
+
+	processNode := func(i int) {
+		nodeInfo := nodeInfoMap[allNodeNames[i]]
+		node := nodeInfo.Node()
+		if node == nil {
+			catchError(fmt.Errorf("node not found"))
+			return
+		}
+		var nodeResult []matchingPodAntiAffinityTerm
+		for _, existingPod := range nodeInfo.PodsWithAffinity() {
+			affinity, err := api.GetAffinityFromPodAnnotations(existingPod.Annotations)
+			if err != nil {
+				catchError(err)
+				return
+			}
+			if affinity == nil {
+				continue
+			}
+			for _, term := range getPodAntiAffinityTerms(affinity.PodAntiAffinity) {
+				match, err := priorityutil.PodMatchesTermsNamespaceAndSelector(pod, existingPod, &term)
+				if err != nil {
+					catchError(err)
+					return
+				}
+				if match {
+					nodeResult = append(nodeResult, matchingPodAntiAffinityTerm{term: &term, node: node})
+				}
+			}
+		}
+		if len(nodeResult) > 0 {
+			appendResult(nodeResult)
+		}
+	}
+	workqueue.Parallelize(16, len(allNodeNames), processNode)
+	return result, firstError
+}
+
+func (c *PodAffinityChecker) getMatchingAntiAffinityTerms(pod *api.Pod, allPods []*api.Pod) ([]matchingPodAntiAffinityTerm, error) {
+	var result []matchingPodAntiAffinityTerm
+	for _, existingPod := range allPods {
+		affinity, err := api.GetAffinityFromPodAnnotations(existingPod.Annotations)
+		if err != nil {
+			return nil, err
+		}
+		if affinity.PodAntiAffinity != nil {
+			existingPodNode, err := c.info.GetNodeInfo(existingPod.Spec.NodeName)
+			if err != nil {
+				return nil, err
+			}
+			for _, term := range getPodAntiAffinityTerms(affinity.PodAntiAffinity) {
+				match, err := priorityutil.PodMatchesTermsNamespaceAndSelector(pod, existingPod, &term)
+				if err != nil {
+					return nil, err
+				}
+				if match {
+					result = append(result, matchingPodAntiAffinityTerm{term: &term, node: existingPodNode})
+				}
+			}
+		}
+	}
+	return result, nil
+}
+
+// Checks if scheduling the pod onto this node would break any anti-affinity
+// rules indicated by the existing pods.
+func (c *PodAffinityChecker) satisfiesExistingPodsAntiAffinity(pod *api.Pod, meta interface{}, node *api.Node) bool {
+	var matchingTerms []matchingPodAntiAffinityTerm
+	if predicateMeta, ok := meta.(*predicateMetadata); ok {
+		matchingTerms = predicateMeta.matchingAntiAffinityTerms
+	} else {
+		allPods, err := c.podLister.List(labels.Everything())
+		if err != nil {
+			glog.V(10).Infof("Failed to get all pods, %+v", err)
+			return false
+		}
+		if matchingTerms, err = c.getMatchingAntiAffinityTerms(pod, allPods); err != nil {
+			glog.V(10).Infof("Failed to get all terms that pod %+v matches, err: %+v", podName(pod), err)
 			return false
 		}
 	}
+	for _, term := range matchingTerms {
+		if c.failureDomains.NodesHaveSameTopologyKey(node, term.node, term.term.TopologyKey) {
+			glog.V(10).Infof("Cannot schedule pod %+v onto node %v,because of PodAntiAffinityTerm %v",
+				podName(pod), node.Name, term.term)
+			return false
+		}
+	}
+	if glog.V(10) {
+		// We explicitly don't do glog.V(10).Infof() to avoid computing all the parameters if this is
+		// not logged. There is visible performance gain from it.
+		glog.Infof("Schedule Pod %+v on Node %+v is allowed, existing pods anti-affinity rules satisfied.",
+			podName(pod), node.Name)
 	}
-	// all the required pod affinity scheduling rules satisfied
-	glog.V(10).Infof("All the required pod affinity scheduling rules are satisfied for Pod %+v, on node %v", podName(pod), node.Name)
 	return true
 }
 
-// Checks whether the given node has pods which satisfy all the
+// Checks if scheduling the pod onto this node would break any rules of this pod.
-// required pod anti-affinity scheduling rules.
+func (c *PodAffinityChecker) satisfiesPodsAffinityAntiAffinity(pod *api.Pod, node *api.Node, affinity *api.Affinity) bool {
-// Also checks whether putting the pod onto the node would break
+	allPods, err := c.podLister.List(labels.Everything())
-// any anti-affinity scheduling rules indicated by existing pods.
+	if err != nil {
-// If node has pods which satisfy all the required pod anti-affinity
+		return false
-// scheduling rules and scheduling the pod onto the node won't
+	}
-// break any existing pods' anti-affinity rules, then return true.
+
-func (checker *PodAffinityChecker) NodeMatchesHardPodAntiAffinity(pod *api.Pod, allPods []*api.Pod, node *api.Node, podAntiAffinity *api.PodAntiAffinity) bool {
+	// Check all affinity terms.
-	// foreach element podAntiAffinityTerm of podAntiAffinityTerms
+	for _, term := range getPodAffinityTerms(affinity.PodAffinity) {
-	// if the pod matches the term (breaks the anti-affinity),
+		termMatches, matchingPodExists, err := c.anyPodMatchesPodAffinityTerm(pod, allPods, node, &term)
-	// don't schedule the pod onto this node.
+		if err != nil {
-	for _, podAntiAffinityTerm := range getPodAntiAffinityTerms(podAntiAffinity) {
+			glog.V(10).Infof("Cannot schedule pod %+v onto node %v,because of PodAffinityTerm %v, err: %v",
-		podAntiAffinityTermMatches, _, err := checker.AnyPodMatchesPodAffinityTerm(pod, allPods, node, podAntiAffinityTerm)
+				podName(pod), node.Name, term, err)
-		if err != nil || podAntiAffinityTermMatches {
+			return false
-			glog.V(10).Infof("Cannot schedule pod %+v onto node %v, because not all the existing pods on this node satisfy the PodAntiAffinityTerm %v, err: %v",
+		}
-				podName(pod), node.Name, podAntiAffinityTerm, err)
+		if !termMatches {
+			// If the requirement matches a pod's own labels ane namespace, and there are
+			// no other such pods, then disregard the requirement. This is necessary to
+			// not block forever because the first pod of the collection can't be scheduled.
+			match, err := priorityutil.PodMatchesTermsNamespaceAndSelector(pod, pod, &term)
+			if err != nil || !match || matchingPodExists {
+				glog.V(10).Infof("Cannot schedule pod %+v onto node %v,because of PodAffinityTerm %v, err: %v",
+					podName(pod), node.Name, term, err)
+				return false
+			}
+		}
+	}
+
+	// Check all anti-affinity terms.
+	for _, term := range getPodAntiAffinityTerms(affinity.PodAntiAffinity) {
+		termMatches, _, err := c.anyPodMatchesPodAffinityTerm(pod, allPods, node, &term)
+		if err != nil || termMatches {
+			glog.V(10).Infof("Cannot schedule pod %+v onto node %v,because of PodAntiAffinityTerm %v, err: %v",
+				podName(pod), node.Name, term, err)
 			return false
 		}
 	}
 
-	// Check if scheduling the pod onto this node would break
+	if glog.V(10) {
-	// any anti-affinity rules indicated by the existing pods on the node.
+		// We explicitly don't do glog.V(10).Infof() to avoid computing all the parameters if this is
-	// If it would break, system should not schedule pod onto this node.
+		// not logged. There is visible performance gain from it.
-	for _, ep := range allPods {
+		glog.Infof("Schedule Pod %+v on Node %+v is allowed, pod afinnity/anti-affinity constraints satisfied.",
-		epAffinity, err := api.GetAffinityFromPodAnnotations(ep.Annotations)
+			podName(pod), node.Name)
-		if err != nil {
-			glog.V(10).Infof("Failed to get Affinity from Pod %+v, err: %+v", podName(pod), err)
-			return false
 	}
-		if epAffinity == nil {
-			continue
-		}
-		epNode, err := checker.info.GetNodeInfo(ep.Spec.NodeName)
-		if err != nil {
-			glog.V(10).Infof("Failed to get node from Pod %+v, err: %+v", podName(ep), err)
-			return false
-		}
-		for _, epAntiAffinityTerm := range getPodAntiAffinityTerms(epAffinity.PodAntiAffinity) {
-			match, err := priorityutil.PodMatchesTermsNamespaceAndSelector(pod, ep, &epAntiAffinityTerm)
-			if err != nil {
-				glog.V(10).Infof("Failed to get label selector from anti-affinityterm %+v of existing pod %+v, err: %+v", epAntiAffinityTerm, podName(pod), err)
-				return false
-			}
-			if match && checker.failureDomains.NodesHaveSameTopologyKey(node, epNode, epAntiAffinityTerm.TopologyKey) {
-				glog.V(10).Infof("Cannot schedule Pod %+v, onto node %v because the pod would break the PodAntiAffinityTerm %+v, of existing pod %+v, err: %v",
-					podName(pod), node.Name, epAntiAffinityTerm, podName(ep), err)
-				return false
-			}
-		}
-	}
-	// all the required pod anti-affinity scheduling rules are satisfied
-	glog.V(10).Infof("Can schedule Pod %+v, on node %v because all the required pod anti-affinity scheduling rules are satisfied", podName(pod), node.Name)
 	return true
 }
 
@@ -1026,9 +1113,7 @@ func CheckNodeMemoryPressurePredicate(pod *api.Pod, meta interface{}, nodeInfo *
 	}
 
 	var podBestEffort bool
-
+	if predicateMeta, ok := meta.(*predicateMetadata); ok {
-	predicateMeta, ok := meta.(*predicateMetadata)
-	if ok {
 		podBestEffort = predicateMeta.podBestEffort
 	} else {
 		// We couldn't parse metadata - fallback to computing it.

plugin/pkg/scheduler/algorithm/predicates/predicates_test.go

@@ -237,7 +237,7 @@ func TestPodFitsResources(t *testing.T) {
 		node := api.Node{Status: api.NodeStatus{Capacity: makeResources(10, 20, 0, 32).Capacity, Allocatable: makeAllocatableResources(10, 20, 0, 32)}}
 		test.nodeInfo.SetNode(&node)
 
-		fits, err := PodFitsResources(test.pod, PredicateMetadata(test.pod), test.nodeInfo)
+		fits, err := PodFitsResources(test.pod, PredicateMetadata(test.pod, nil), test.nodeInfo)
 		if !reflect.DeepEqual(err, test.wErr) {
 			t.Errorf("%s: unexpected error: %v, want: %v", test.test, err, test.wErr)
 		}
@@ -290,7 +290,7 @@ func TestPodFitsResources(t *testing.T) {
 		node := api.Node{Status: api.NodeStatus{Capacity: api.ResourceList{}, Allocatable: makeAllocatableResources(10, 20, 0, 1)}}
 		test.nodeInfo.SetNode(&node)
 
-		fits, err := PodFitsResources(test.pod, PredicateMetadata(test.pod), test.nodeInfo)
+		fits, err := PodFitsResources(test.pod, PredicateMetadata(test.pod, nil), test.nodeInfo)
 		if !reflect.DeepEqual(err, test.wErr) {
 			t.Errorf("%s: unexpected error: %v, want: %v", test.test, err, test.wErr)
 		}
@@ -346,7 +346,7 @@ func TestPodFitsHost(t *testing.T) {
 	for _, test := range tests {
 		nodeInfo := schedulercache.NewNodeInfo()
 		nodeInfo.SetNode(test.node)
-		result, err := PodFitsHost(test.pod, PredicateMetadata(test.pod), nodeInfo)
+		result, err := PodFitsHost(test.pod, PredicateMetadata(test.pod, nil), nodeInfo)
 		if !reflect.DeepEqual(err, ErrPodNotMatchHostName) && err != nil {
 			t.Errorf("unexpected error: %v", err)
 		}
@@ -419,7 +419,7 @@ func TestPodFitsHostPorts(t *testing.T) {
 		},
 	}
 	for _, test := range tests {
-		fits, err := PodFitsHostPorts(test.pod, PredicateMetadata(test.pod), test.nodeInfo)
+		fits, err := PodFitsHostPorts(test.pod, PredicateMetadata(test.pod, nil), test.nodeInfo)
 		if !reflect.DeepEqual(err, ErrPodNotFitsHostPorts) && err != nil {
 			t.Errorf("unexpected error: %v", err)
 		}
@@ -504,7 +504,7 @@ func TestDiskConflicts(t *testing.T) {
 	}
 
 	for _, test := range tests {
-		ok, err := NoDiskConflict(test.pod, PredicateMetadata(test.pod), test.nodeInfo)
+		ok, err := NoDiskConflict(test.pod, PredicateMetadata(test.pod, nil), test.nodeInfo)
 		if !reflect.DeepEqual(err, ErrDiskConflict) && err != nil {
 			t.Errorf("unexpected error: %v", err)
 		}
@@ -556,7 +556,7 @@ func TestAWSDiskConflicts(t *testing.T) {
 	}
 
 	for _, test := range tests {
-		ok, err := NoDiskConflict(test.pod, PredicateMetadata(test.pod), test.nodeInfo)
+		ok, err := NoDiskConflict(test.pod, PredicateMetadata(test.pod, nil), test.nodeInfo)
 		if !reflect.DeepEqual(err, ErrDiskConflict) && err != nil {
 			t.Errorf("unexpected error: %v", err)
 		}
@@ -614,7 +614,7 @@ func TestRBDDiskConflicts(t *testing.T) {
 	}
 
 	for _, test := range tests {
-		ok, err := NoDiskConflict(test.pod, PredicateMetadata(test.pod), test.nodeInfo)
+		ok, err := NoDiskConflict(test.pod, PredicateMetadata(test.pod, nil), test.nodeInfo)
 		if !reflect.DeepEqual(err, ErrDiskConflict) && err != nil {
 			t.Errorf("unexpected error: %v", err)
 		}
@@ -1093,7 +1093,7 @@ func TestPodFitsSelector(t *testing.T) {
 		nodeInfo := schedulercache.NewNodeInfo()
 		nodeInfo.SetNode(&node)
 
-		fits, err := PodSelectorMatches(test.pod, PredicateMetadata(test.pod), nodeInfo)
+		fits, err := PodSelectorMatches(test.pod, PredicateMetadata(test.pod, nil), nodeInfo)
 		if !reflect.DeepEqual(err, ErrNodeSelectorNotMatch) && err != nil {
 			t.Errorf("unexpected error: %v", err)
 		}
@@ -1158,7 +1158,7 @@ func TestNodeLabelPresence(t *testing.T) {
 		nodeInfo.SetNode(&node)
 
 		labelChecker := NodeLabelChecker{test.labels, test.presence}
-		fits, err := labelChecker.CheckNodeLabelPresence(test.pod, PredicateMetadata(test.pod), nodeInfo)
+		fits, err := labelChecker.CheckNodeLabelPresence(test.pod, PredicateMetadata(test.pod, nil), nodeInfo)
 		if !reflect.DeepEqual(err, ErrNodeLabelPresenceViolated) && err != nil {
 			t.Errorf("unexpected error: %v", err)
 		}
@@ -1303,7 +1303,7 @@ func TestServiceAffinity(t *testing.T) {
 		serviceAffinity := ServiceAffinity{algorithm.FakePodLister(test.pods), algorithm.FakeServiceLister(test.services), FakeNodeListInfo(nodes), test.labels}
 		nodeInfo := schedulercache.NewNodeInfo()
 		nodeInfo.SetNode(test.node)
-		fits, err := serviceAffinity.CheckServiceAffinity(test.pod, PredicateMetadata(test.pod), nodeInfo)
+		fits, err := serviceAffinity.CheckServiceAffinity(test.pod, PredicateMetadata(test.pod, nil), nodeInfo)
 		if !reflect.DeepEqual(err, ErrServiceAffinityViolated) && err != nil {
 			t.Errorf("unexpected error: %v", err)
 		}
@@ -1584,7 +1584,7 @@ func TestEBSVolumeCountConflicts(t *testing.T) {
 
 	for _, test := range tests {
 		pred := NewMaxPDVolumeCountPredicate(filter, test.maxVols, pvInfo, pvcInfo)
-		fits, err := pred(test.newPod, PredicateMetadata(test.newPod), schedulercache.NewNodeInfo(test.existingPods...))
+		fits, err := pred(test.newPod, PredicateMetadata(test.newPod, nil), schedulercache.NewNodeInfo(test.existingPods...))
 		if err != nil && !reflect.DeepEqual(err, ErrMaxVolumeCountExceeded) {
 			t.Errorf("unexpected error: %v", err)
 		}
@@ -1778,7 +1778,7 @@ func TestRunGeneralPredicates(t *testing.T) {
 	}
 	for _, test := range resourceTests {
 		test.nodeInfo.SetNode(test.node)
-		fits, err := GeneralPredicates(test.pod, PredicateMetadata(test.pod), test.nodeInfo)
+		fits, err := GeneralPredicates(test.pod, PredicateMetadata(test.pod, nil), test.nodeInfo)
 		if !reflect.DeepEqual(err, test.wErr) {
 			t.Errorf("%s: unexpected error: %v, want: %v", test.test, err, test.wErr)
 		}
@@ -2326,7 +2326,8 @@ func TestInterPodAffinity(t *testing.T) {
 		}
 		nodeInfo := schedulercache.NewNodeInfo(podsOnNode...)
 		nodeInfo.SetNode(test.node)
-		fits, err := fit.InterPodAffinityMatches(test.pod, PredicateMetadata(test.pod), nodeInfo)
+		nodeInfoMap := map[string]*schedulercache.NodeInfo{test.node.Name: nodeInfo}
+		fits, err := fit.InterPodAffinityMatches(test.pod, PredicateMetadata(test.pod, nodeInfoMap), nodeInfo)
 		if !reflect.DeepEqual(err, ErrPodAffinityNotMatch) && err != nil {
 			t.Errorf("%s: unexpected error %v", test.test, err)
 		}
@@ -2492,7 +2493,8 @@ func TestInterPodAffinityWithMultipleNodes(t *testing.T) {
 			}
 			nodeInfo := schedulercache.NewNodeInfo(podsOnNode...)
 			nodeInfo.SetNode(&node)
-			fits, err := testFit.InterPodAffinityMatches(test.pod, PredicateMetadata(test.pod), nodeInfo)
+			nodeInfoMap := map[string]*schedulercache.NodeInfo{node.Name: nodeInfo}
+			fits, err := testFit.InterPodAffinityMatches(test.pod, PredicateMetadata(test.pod, nodeInfoMap), nodeInfo)
 			if !reflect.DeepEqual(err, ErrPodAffinityNotMatch) && err != nil {
 				t.Errorf("%s: unexpected error %v", test.test, err)
 			}
@@ -2503,7 +2505,8 @@ func TestInterPodAffinityWithMultipleNodes(t *testing.T) {
 			if affinity != nil && affinity.NodeAffinity != nil {
 				nodeInfo := schedulercache.NewNodeInfo()
 				nodeInfo.SetNode(&node)
-				fits2, err := PodSelectorMatches(test.pod, PredicateMetadata(test.pod), nodeInfo)
+				nodeInfoMap := map[string]*schedulercache.NodeInfo{node.Name: nodeInfo}
+				fits2, err := PodSelectorMatches(test.pod, PredicateMetadata(test.pod, nodeInfoMap), nodeInfo)
 				if !reflect.DeepEqual(err, ErrNodeSelectorNotMatch) && err != nil {
 					t.Errorf("unexpected error: %v", err)
 				}
@@ -2789,7 +2792,7 @@ func TestPodToleratesTaints(t *testing.T) {
 	for _, test := range podTolerateTaintsTests {
 		nodeInfo := schedulercache.NewNodeInfo()
 		nodeInfo.SetNode(&test.node)
-		fits, err := PodToleratesNodeTaints(test.pod, PredicateMetadata(test.pod), nodeInfo)
+		fits, err := PodToleratesNodeTaints(test.pod, PredicateMetadata(test.pod, nil), nodeInfo)
 		if fits == false && !reflect.DeepEqual(err, ErrTaintsTolerationsNotMatch) {
 			t.Errorf("%s, unexpected error: %v", test.test, err)
 		}
@@ -2895,7 +2898,7 @@ func TestPodSchedulesOnNodeWithMemoryPressureCondition(t *testing.T) {
 	}
 
 	for _, test := range tests {
-		fits, err := CheckNodeMemoryPressurePredicate(test.pod, PredicateMetadata(test.pod), test.nodeInfo)
+		fits, err := CheckNodeMemoryPressurePredicate(test.pod, PredicateMetadata(test.pod, nil), test.nodeInfo)
 		if fits != test.fits {
 			t.Errorf("%s: expected %v got %v", test.name, test.fits, fits)
 		}

plugin/pkg/scheduler/generic_scheduler.go

@@ -152,7 +152,7 @@ func findNodesThatFit(
 		// Create filtered list with enough space to avoid growing it
 		// and allow assigning.
 		filtered = make([]*api.Node, len(nodes))
-		meta := predicates.PredicateMetadata(pod)
+		meta := predicates.PredicateMetadata(pod, nodeNameToInfo)
 		errs := []error{}
 
 		var predicateResultLock sync.Mutex