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Score plugin for the scheduling framework.

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This commit is contained in:
Abdullah Gharaibeh
2019-07-16 09:19:20 -04:00
parent 8e3a2f2a5b
commit c54c4d1962
8 changed files with 255 additions and 32 deletions
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22
pkg/scheduler/framework/v1alpha1/interface.go
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@@ -30,6 +30,12 @@ import (
// Code is the Status code/type which is returned from plugins.
type Code int
// NodeScoreList declares a list of nodes and their scores.
type NodeScoreList []int
// PluginToNodeScoreMap declares a map from plugin name to its NodeScoreList.
type PluginToNodeScoreMap map[string]NodeScoreList
// These are predefined codes used in a Status.
const (
// Success means that plugin ran correctly and found pod schedulable.
@@ -137,6 +143,16 @@ type PrefilterPlugin interface {
Prefilter(pc *PluginContext, p *v1.Pod) *Status
}
// ScorePlugin is an interface that must be implemented by "score" plugins to rank
// nodes that passed the filtering phase.
type ScorePlugin interface {
Plugin
// Score is called on each filtered node. It must return success and an integer
// indicating the rank of the node. All scoring plugins must return success or
// the pod will be rejected.
Score(pc *PluginContext, p *v1.Pod, nodeName string) (int, *Status)
}
// ReservePlugin is an interface for Reserve plugins. These plugins are called
// at the reservation point. These are meant to update the state of the plugin.
// This concept used to be called 'assume' in the original scheduler.
@@ -220,6 +236,12 @@ type Framework interface {
// cycle is aborted.
RunPrefilterPlugins(pc *PluginContext, pod *v1.Pod) *Status
// RunScorePlugins runs the set of configured scoring plugins. It returns a map that
// stores for each scoring plugin name the corresponding NodeScoreList(s).
// It also returns *Status, which is set to non-success if any of the plugins returns
// a non-success status.
RunScorePlugins(pc *PluginContext, pod *v1.Pod, nodes []*v1.Node) (PluginToNodeScoreMap, *Status)
// RunPrebindPlugins runs the set of configured prebind plugins. It returns
// *Status and its code is set to non-success if any of the plugins returns
// anything but Success. If the Status code is "Unschedulable", it is