Downward API hugepages

pkg/apis/core/helper/helpers.go

@@ -497,3 +497,38 @@ func PersistentVolumeClaimHasClass(claim *core.PersistentVolumeClaim) bool {
 
 	return false
 }
+
+func toResourceNames(resources core.ResourceList) []core.ResourceName {
+	result := []core.ResourceName{}
+	for resourceName := range resources {
+		result = append(result, resourceName)
+	}
+	return result
+}
+
+func toSet(resourceNames []core.ResourceName) sets.String {
+	result := sets.NewString()
+	for _, resourceName := range resourceNames {
+		result.Insert(string(resourceName))
+	}
+	return result
+}
+
+// toContainerResourcesSet returns a set of resources names in container resource requirements
+func toContainerResourcesSet(ctr *core.Container) sets.String {
+	resourceNames := toResourceNames(ctr.Resources.Requests)
+	resourceNames = append(resourceNames, toResourceNames(ctr.Resources.Limits)...)
+	return toSet(resourceNames)
+}
+
+// ToPodResourcesSet returns a set of resource names in all containers in a pod.
+func ToPodResourcesSet(podSpec *core.PodSpec) sets.String {
+	result := sets.NewString()
+	for i := range podSpec.InitContainers {
+		result = result.Union(toContainerResourcesSet(&podSpec.InitContainers[i]))
+	}
+	for i := range podSpec.Containers {
+		result = result.Union(toContainerResourcesSet(&podSpec.Containers[i]))
+	}
+	return result
+}