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feat: move classifier to its own package

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move the classifier to its own package. introduces a generic way of
classifying usages against thresholds.
This commit is contained in:
Ricardo Maraschini
2025-03-20 11:02:47 +01:00
parent 89535b9b9b
commit 95a631f6a5
6 changed files with 1241 additions and 74 deletions
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35
pkg/framework/plugins/nodeutilization/lownodeutilization.go
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@@ -28,6 +28,7 @@ import (
"sigs.k8s.io/descheduler/pkg/descheduler/evictions"
nodeutil "sigs.k8s.io/descheduler/pkg/descheduler/node"
podutil "sigs.k8s.io/descheduler/pkg/descheduler/pod"
"sigs.k8s.io/descheduler/pkg/framework/plugins/nodeutilization/classifier"
"sigs.k8s.io/descheduler/pkg/framework/plugins/nodeutilization/normalizer"
frameworktypes "sigs.k8s.io/descheduler/pkg/framework/types"
)
@@ -185,25 +186,23 @@ func (l *LowNodeUtilization) Balance(ctx context.Context, nodes []*v1.Node) *fra
// classify nodes in under and over utilized. we will later try to move
// pods from the overutilized nodes to the underutilized ones.
nodeGroups := classifyNodeUsage(
nodeGroups := classifier.Classify(
usage, thresholds,
[]classifierFnc{
// underutilization criteria processing. nodes that are
// underutilized but aren't schedulable are ignored.
func(nodeName string, usage, threshold api.ResourceThresholds) bool {
if nodeutil.IsNodeUnschedulable(nodesMap[nodeName]) {
klog.V(2).InfoS(
"Node is unschedulable, thus not considered as underutilized",
"node", klog.KObj(nodesMap[nodeName]),
)
return false
}
return isNodeBelowThreshold(usage, threshold)
},
// overutilization criteria evaluation.
func(nodeName string, usage, threshold api.ResourceThresholds) bool {
return isNodeAboveThreshold(usage, threshold)
},
// underutilization criteria processing. nodes that are
// underutilized but aren't schedulable are ignored.
func(nodeName string, usage, threshold api.ResourceThresholds) bool {
if nodeutil.IsNodeUnschedulable(nodesMap[nodeName]) {
klog.V(2).InfoS(
"Node is unschedulable, thus not considered as underutilized",
"node", klog.KObj(nodesMap[nodeName]),
)
return false
}
return isNodeBelowThreshold(usage, threshold)
},
// overutilization criteria evaluation.
func(nodeName string, usage, threshold api.ResourceThresholds) bool {
return isNodeAboveThreshold(usage, threshold)
},
)