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address review comments
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@ -54,11 +54,13 @@ func NewSelectorSpreadPriority(
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return selectorSpread.CalculateSpreadPriorityMap, selectorSpread.CalculateSpreadPriorityReduce
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}
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// CalculateSpreadPriorityMap spreads pods across hosts, considering pods belonging to the same service or replication controller.
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// When a pod is scheduled, it looks for services, RCs or RSs that match the pod, then finds existing pods that match those selectors.
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// CalculateSpreadPriorityMap spreads pods across hosts, considering pods
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// belonging to the same service,RC,RS or StatefulSet.
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// When a pod is scheduled, it looks for services, RCs,RSs and StatefulSets that match the pod,
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// then finds existing pods that match those selectors.
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// It favors nodes that have fewer existing matching pods.
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// i.e. it pushes the scheduler towards a node where there's the smallest number of
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// pods which match the same service, RC or RS selectors as the pod being scheduled.
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// pods which match the same service, RC,RSs or StatefulSets selectors as the pod being scheduled.
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func (s *SelectorSpread) CalculateSpreadPriorityMap(pod *v1.Pod, meta interface{}, nodeInfo *schedulercache.NodeInfo) (schedulerapi.HostPriority, error) {
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var selectors []labels.Selector
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node := nodeInfo.Node()
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@ -80,7 +82,7 @@ func (s *SelectorSpread) CalculateSpreadPriorityMap(pod *v1.Pod, meta interface{
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}, nil
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}
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count := float64(0)
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count := int(0)
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for _, nodePod := range nodeInfo.Pods() {
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if pod.Namespace != nodePod.Namespace {
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continue
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@ -110,32 +112,24 @@ func (s *SelectorSpread) CalculateSpreadPriorityMap(pod *v1.Pod, meta interface{
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}, nil
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}
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// CalculateSpreadPriorityReduce calculates the source of each node based on the number of existing matching pods on the node
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// where zone information is included on the nodes, it favors nodes in zones with fewer existing matching pods.
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// CalculateSpreadPriorityReduce calculates the source of each node
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// based on the number of existing matching pods on the node
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// where zone information is included on the nodes, it favors nodes
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// in zones with fewer existing matching pods.
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func (s *SelectorSpread) CalculateSpreadPriorityReduce(pod *v1.Pod, meta interface{}, nodeNameToInfo map[string]*schedulercache.NodeInfo, result schedulerapi.HostPriorityList) error {
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var selectors []labels.Selector
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countsByZone := make(map[string]int, 10)
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maxCountByZone := int(0)
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maxCountByNodeName := int(0)
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priorityMeta, ok := meta.(*priorityMetadata)
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if ok {
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selectors = priorityMeta.podSelectors
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} else {
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selectors = getSelectors(pod, s.serviceLister, s.controllerLister, s.replicaSetLister, s.statefulSetLister)
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}
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if len(selectors) > 0 {
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for i := range result {
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if result[i].Score > maxCountByNodeName {
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maxCountByNodeName = result[i].Score
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}
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zoneId := utilnode.GetZoneKey(nodeNameToInfo[result[i].Host].Node())
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if zoneId == "" {
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continue
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}
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countsByZone[zoneId] += result[i].Score
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for i := range result {
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if result[i].Score > maxCountByNodeName {
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maxCountByNodeName = result[i].Score
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}
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zoneId := utilnode.GetZoneKey(nodeNameToInfo[result[i].Host].Node())
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if zoneId == "" {
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continue
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}
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countsByZone[zoneId] += result[i].Score
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}
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for zoneId := range countsByZone {
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@ -146,19 +140,23 @@ func (s *SelectorSpread) CalculateSpreadPriorityReduce(pod *v1.Pod, meta interfa
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haveZones := len(countsByZone) != 0
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maxCountByNodeNameFloat64 := float64(maxCountByNodeName)
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maxCountByZoneFloat64 := float64(maxCountByZone)
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MaxPriorityFloat64 := float64(schedulerapi.MaxPriority)
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for i := range result {
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// initializing to the default/max node score of maxPriority
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fScore := float64(schedulerapi.MaxPriority)
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fScore := MaxPriorityFloat64
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if maxCountByNodeName > 0 {
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fScore = float64(schedulerapi.MaxPriority) * (float64(maxCountByNodeName-result[i].Score) / float64(maxCountByNodeName))
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fScore = MaxPriorityFloat64 * (float64(maxCountByNodeName-result[i].Score) / maxCountByNodeNameFloat64)
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}
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// If there is zone information present, incorporate it
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if haveZones {
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zoneId := utilnode.GetZoneKey(nodeNameToInfo[result[i].Host].Node())
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if zoneId != "" {
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zoneScore := float64(schedulerapi.MaxPriority)
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zoneScore := MaxPriorityFloat64
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if maxCountByZone > 0 {
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zoneScore = float64(schedulerapi.MaxPriority) * (float64(maxCountByZone-countsByZone[zoneId]) / float64(maxCountByZone))
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zoneScore = MaxPriorityFloat64 * (float64(maxCountByZone-countsByZone[zoneId]) / maxCountByZoneFloat64)
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}
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fScore = (fScore * (1.0 - zoneWeighting)) + (zoneWeighting * zoneScore)
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}
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@ -553,7 +553,6 @@ func TestZoneSelectorSpreadPriority(t *testing.T) {
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buildPod(nodeMachine1Zone2, labels1, controllerRef("ReplicationController", "name", "abc123")),
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buildPod(nodeMachine1Zone3, labels1, controllerRef("ReplicationController", "name", "abc123")),
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},
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//nodes: []string{nodeMachine1Zone3, nodeMachine1Zone2, nodeMachine1Zone3},
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rcs: []*v1.ReplicationController{{Spec: v1.ReplicationControllerSpec{Selector: labels1}}},
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expectedList: []schedulerapi.HostPriority{
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// Note that because we put two pods on the same node (nodeMachine1Zone3),
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@ -218,7 +218,6 @@ func defaultPriorities() sets.String {
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Weight: 1,
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},
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),
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// pods should be placed in the same topological domain (e.g. same node, same rack, same zone, same power domain, etc.)
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// as some other pods, or, conversely, should not be placed in the same topological domain as some other pods.
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factory.RegisterPriorityConfigFactory(
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