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Merge pull request #80503 from tedyu/spread-constaints

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Refactor nested loop in getTPMapMatchingSpreadConstraints
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Kubernetes Prow Robot 2019-07-25 20:48:11 -07:00 committed by GitHub
commit 50a0d38e3a
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1 changed files with 20 additions and 21 deletions
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41
pkg/scheduler/algorithm/predicates/metadata.go
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@ -232,20 +232,20 @@ func getTPMapMatchingSpreadConstraints(pod *v1.Pod, nodeInfoMap map[string]*sche
if !podMatchesNodeSelectorAndAffinityTerms(pod, node) { if !podMatchesNodeSelectorAndAffinityTerms(pod, node) {
return return
} }
// Ensure current node's labels contains all topologyKeys in 'constraints'. // Ensure current node's labels contains all topologyKeys in 'constraints'.
if !nodeLabelsMatchSpreadConstraints(node.Labels, constraints) { if !nodeLabelsMatchSpreadConstraints(node.Labels, constraints) {
return return
} }
nodeTopologyMaps := newTopologyPairsMaps() nodeTopologyMaps := newTopologyPairsMaps()
// nodeInfo.Pods() can be empty; or all pods don't fit for _, constraint := range constraints {
for _, existingPod := range nodeInfo.Pods() { pairAdded := false
if existingPod.Namespace != pod.Namespace { // nodeInfo.Pods() can be empty; or all pods don't fit
continue for _, existingPod := range nodeInfo.Pods() {
} if existingPod.Namespace != pod.Namespace {
podLabelSet := labels.Set(existingPod.Labels) continue
for _, constraint := range constraints { }
ok, err := podMatchesSpreadConstraint(podLabelSet, constraint) ok, err := podMatchesSpreadConstraint(existingPod.Labels, constraint)
if err != nil { if err != nil {
errCh.SendErrorWithCancel(err, cancel) errCh.SendErrorWithCancel(err, cancel)
return return
@ -254,21 +254,20 @@ func getTPMapMatchingSpreadConstraints(pod *v1.Pod, nodeInfoMap map[string]*sche
// constraint.TopologyKey is already guaranteed to be present // constraint.TopologyKey is already guaranteed to be present
pair := topologyPair{key: constraint.TopologyKey, value: node.Labels[constraint.TopologyKey]} pair := topologyPair{key: constraint.TopologyKey, value: node.Labels[constraint.TopologyKey]}
nodeTopologyMaps.addTopologyPair(pair, existingPod) nodeTopologyMaps.addTopologyPair(pair, existingPod)
pairAdded = true
} }
} }
} // If needed, append topology pair without entry of pods.
// If needed, append topology pair without entry of pods. // For example, on node-x, there is no pod matching spread constraints,
// For example, on node-x, there is no pod matching spread constraints, // but node-x should be also considered as a match (with match number 0)
// but node-x should be also considered as a match (with match number 0) // i.e. <node: node-x>: {}
// i.e. <node: node-x>: {} if !pairAdded {
for _, constraint := range constraints { pair := topologyPair{
// constraint.TopologyKey is already guaranteed to be present key: constraint.TopologyKey,
pair := topologyPair{ value: node.Labels[constraint.TopologyKey],
key: constraint.TopologyKey, }
value: node.Labels[constraint.TopologyKey], nodeTopologyMaps.addTopologyPairWithoutPods(pair)
} }
// addTopologyPairWithoutPods is a non-op if other pods match this pair
nodeTopologyMaps.addTopologyPairWithoutPods(pair)
} }
appendTopologyPairsMaps(nodeTopologyMaps) appendTopologyPairsMaps(nodeTopologyMaps)