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Migrate EqualPriority to MapReduce-like framework.

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This commit is contained in:
Wojciech Tyczynski
2016-09-30 15:14:29 +02:00
parent daac9a1869
commit f8632e2203
6 changed files with 42 additions and 23 deletions
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5
plugin/pkg/scheduler/algorithm/priorities/selector_spreading.go
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@@ -56,6 +56,7 @@ func NewSelectorSpreadPriority(
return selectorSpread.CalculateSpreadPriority
}
// Returns selectors of services, RCs and RSs matching the given pod.
func getSelectors(pod *api.Pod, sl algorithm.ServiceLister, cl algorithm.ControllerLister, rsl algorithm.ReplicaSetLister) []labels.Selector {
selectors := make([]labels.Selector, 0, 3)
if services, err := sl.GetPodServices(pod); err == nil {
@@ -83,10 +84,10 @@ func (s *SelectorSpread) getSelectors(pod *api.Pod) []labels.Selector {
}
// CalculateSpreadPriority spreads pods across hosts and zones, considering pods belonging to the same service or replication controller.
// When a pod is scheduled, it looks for services or RCs that match the pod, then finds existing pods that match those selectors.
// When a pod is scheduled, it looks for services, RCs or RSs that match the pod, then finds existing pods that match those selectors.
// It favors nodes that have fewer existing matching pods.
// i.e. it pushes the scheduler towards a node where there's the smallest number of
// pods which match the same service selectors or RC selectors as the pod being scheduled.
// pods which match the same service, RC or RS selectors as the pod being scheduled.
// Where zone information is included on the nodes, it favors nodes in zones with fewer existing matching pods.
func (s *SelectorSpread) CalculateSpreadPriority(pod *api.Pod, nodeNameToInfo map[string]*schedulercache.NodeInfo, nodes []*api.Node) (schedulerapi.HostPriorityList, error) {
selectors := s.getSelectors(pod)