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Add MemoryReservationPolicy to kubeletconfig for MemoryQoS feature

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Add MemoryReservationPolicy (None/HardReservation) controls memory.min. This allows
independently of memory.min protection, providing operators more
granular control over memoryQoS behavior.
Signed-off-by: Qi Wang <qiwan@redhat.com>
This commit is contained in:
Qi Wang
2026-03-09 19:57:43 -04:00
parent 9c7e57bb7c
commit f1ccd2d8aa
28 changed files with 251 additions and 30 deletions
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3
pkg/volume/emptydir/empty_dir.go
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@@ -35,6 +35,7 @@ import (
utilfeature "k8s.io/apiserver/pkg/util/feature"
resourcehelper "k8s.io/component-helpers/resource"
v1helper "k8s.io/kubernetes/pkg/apis/core/v1/helper"
"k8s.io/kubernetes/pkg/kubelet/apis/config"
"k8s.io/kubernetes/pkg/kubelet/cm"
usernamespacefeature "k8s.io/kubernetes/pkg/kubelet/userns"
"k8s.io/kubernetes/pkg/volume"
@@ -119,7 +120,7 @@ func calculateEmptyDirMemorySize(nodeAllocatableMemory *resource.Quantity, spec
// determine pod resource allocation
// we use the same function for pod cgroup assignment to maintain consistent behavior
// NOTE: this could be nil on systems that do not support pod memory containment (i.e. windows)
podResourceConfig := cm.ResourceConfigForPod(pod, false, uint64(100000), false)
podResourceConfig := cm.ResourceConfigForPod(pod, false, uint64(100000), false, config.NoneMemoryReservationPolicy)
if podResourceConfig != nil && podResourceConfig.Memory != nil {
podMemoryLimit := resource.NewQuantity(*(podResourceConfig.Memory), resource.BinarySI)
// ensure 0 < value < size