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Implement support for multiple sizes huge pages

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This implementation allows Pod to request multiple hugepage resources
of different size and mount hugepage volumes using storage medium
HugePage-<size>, e.g.

spec:
  containers:
    resources:
      requests:
        hugepages-2Mi: 2Mi
        hugepages-1Gi: 2Gi
    volumeMounts:
      - mountPath: /hugepages-2Mi
        name: hugepage-2mi
      - mountPath: /hugepages-1Gi
        name: hugepage-1gi
    ...
  volumes:
    - name: hugepage-2mi
      emptyDir:
        medium: HugePages-2Mi
    - name: hugepage-1gi
      emptyDir:
        medium: HugePages-1Gi

NOTE: This is an alpha feature.
      Feature gate HugePageStorageMediumSize must be enabled for it to work.
This commit is contained in:
Ed Bartosh
2019-10-17 15:25:06 +03:00
parent ddd6d668f6
commit 0eb65bd7da
13 changed files with 148 additions and 51 deletions
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13
pkg/kubelet/config/common.go
View File

@@ -27,8 +27,10 @@ import (
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/types"
utilyaml "k8s.io/apimachinery/pkg/util/yaml"
utilfeature "k8s.io/apiserver/pkg/util/feature"
api "k8s.io/kubernetes/pkg/apis/core"
"k8s.io/kubernetes/pkg/apis/core/helper"
"k8s.io/kubernetes/pkg/features"
// TODO: remove this import if
// api.Registry.GroupOrDie(v1.GroupName).GroupVersion.String() is changed
@@ -133,7 +135,10 @@ func tryDecodeSinglePod(data []byte, defaultFn defaultFunc) (parsed bool, pod *v
if err = defaultFn(newPod); err != nil {
return true, pod, err
}
if errs := validation.ValidatePod(newPod); len(errs) > 0 {
opts := validation.PodValidationOptions{
AllowMultipleHugePageResources: utilfeature.DefaultFeatureGate.Enabled(features.HugePageStorageMediumSize),
}
if errs := validation.ValidatePod(newPod, opts); len(errs) > 0 {
return true, pod, fmt.Errorf("invalid pod: %v", errs)
}
v1Pod := &v1.Pod{}
@@ -157,13 +162,17 @@ func tryDecodePodList(data []byte, defaultFn defaultFunc) (parsed bool, pods v1.
return false, pods, err
}
opts := validation.PodValidationOptions{
AllowMultipleHugePageResources: utilfeature.DefaultFeatureGate.Enabled(features.HugePageStorageMediumSize),
}
// Apply default values and validate pods.
for i := range newPods.Items {
newPod := &newPods.Items[i]
if err = defaultFn(newPod); err != nil {
return true, pods, err
}
if errs := validation.ValidatePod(newPod); len(errs) > 0 {
if errs := validation.ValidatePod(newPod, opts); len(errs) > 0 {
err = fmt.Errorf("invalid pod: %v", errs)
return true, pods, err
}