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Enhancements to scheduler priority functions

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- Modified the existing spreading priority to consider service pods explicitly
 - Added a new priority function to spread pods across zones
This commit is contained in:
Abhishek Gupta
2014-12-12 14:29:20 -08:00
parent 3ca6c231b2
commit 04db076e5f
5 changed files with 399 additions and 41 deletions
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13
plugin/pkg/scheduler/algorithmprovider/defaults/defaults.go
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@@ -31,11 +31,11 @@ func defaultPredicates() util.StringSet {
return util.NewStringSet(
// Fit is defined based on the absence of port conflicts.
factory.RegisterFitPredicate("PodFitsPorts", algorithm.PodFitsPorts),
// Fit is determined by resource availability
// Fit is determined by resource availability.
factory.RegisterFitPredicate("PodFitsResources", algorithm.NewResourceFitPredicate(factory.MinionLister)),
// Fit is determined by non-conflicting disk volumes
// Fit is determined by non-conflicting disk volumes.
factory.RegisterFitPredicate("NoDiskConflict", algorithm.NoDiskConflict),
// Fit is determined by node selector query
// Fit is determined by node selector query.
factory.RegisterFitPredicate("MatchNodeSelector", algorithm.NewSelectorMatchPredicate(factory.MinionLister)),
// Fit is determined by the presence of the Host parameter and a string match
factory.RegisterFitPredicate("HostName", algorithm.PodFitsHost),
@@ -46,8 +46,11 @@ func defaultPriorities() util.StringSet {
return util.NewStringSet(
// Prioritize nodes by least requested utilization.
factory.RegisterPriorityFunction("LeastRequestedPriority", algorithm.LeastRequestedPriority, 1),
// spreads pods by minimizing the number of pods on the same minion with the same labels.
factory.RegisterPriorityFunction("SpreadingPriority", algorithm.CalculateSpreadPriority, 1),
// spreads pods by minimizing the number of pods (belonging to the same service) on the same minion.
factory.RegisterPriorityFunction("ServiceSpreadingPriority", algorithm.NewServiceSpreadPriority(factory.ServiceLister), 1),
// spreads pods belonging to the same service across minions in different zones
// TODO: remove the hardcoding of the "zone" label and move it to a constant
factory.RegisterPriorityFunction("ZoneSpreadingPriority", algorithm.NewZoneSpreadPriority(factory.ServiceLister, "zone"), 1),
// EqualPriority is a prioritizer function that gives an equal weight of one to all minions
factory.RegisterPriorityFunction("EqualPriority", algorithm.EqualPriority, 0),
)