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feat: introduce strict eviction policy

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with strict eviction policy the descheduler only evict pods if the pod
contains a request for the given threshold. for example, if using a
threshold for an extended resource called `example.com/gpu` only pods
who request such a resource will be evicted.
This commit is contained in:
Ricardo Maraschini
2025-04-08 19:33:23 +02:00
parent cca28f7bbe
commit 35a7178df6
7 changed files with 149 additions and 6 deletions
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17
pkg/framework/plugins/nodeutilization/nodeutilization.go
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@@ -32,6 +32,7 @@ import (
"k8s.io/utils/ptr"
"sigs.k8s.io/descheduler/pkg/descheduler/evictions"
nodeutil "sigs.k8s.io/descheduler/pkg/descheduler/node"
"sigs.k8s.io/descheduler/pkg/descheduler/pod"
podutil "sigs.k8s.io/descheduler/pkg/descheduler/pod"
"sigs.k8s.io/descheduler/pkg/framework/plugins/nodeutilization/normalizer"
frameworktypes "sigs.k8s.io/descheduler/pkg/framework/types"
@@ -752,3 +753,19 @@ func assessAvailableResourceInNodes(
return available, nil
}
// withResourceRequestForAny returns a filter function that checks if a pod
// has a resource request specified for any of the given resources names.
func withResourceRequestForAny(names ...v1.ResourceName) pod.FilterFunc {
return func(pod *v1.Pod) bool {
all := append(pod.Spec.Containers, pod.Spec.InitContainers...)
for _, name := range names {
for _, container := range all {
if _, ok := container.Resources.Requests[name]; ok {
return true
}
}
}
return false
}
}