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helpers.go
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helpers.go
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/*
Copyright 2014 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
// origin: https://github.com/kubernetes/kubernetes/blob/1467b588060812a11c3e556f645ce0a949bb4b36/pkg/apis/core/helper/helpers.go
// Modifications Copyright 2024 SAP SE or an SAP affiliate company and Gardener contributors
package core
import (
"fmt"
"strings"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/util/sets"
"k8s.io/apimachinery/pkg/util/validation"
)
var integerResources = sets.NewString(
string(corev1.ResourcePods),
string(corev1.ResourceQuotas),
string(corev1.ResourceServices),
string(corev1.ResourceReplicationControllers),
string(corev1.ResourceSecrets),
string(corev1.ResourceConfigMaps),
string(corev1.ResourcePersistentVolumeClaims),
string(corev1.ResourceServicesNodePorts),
string(corev1.ResourceServicesLoadBalancers),
)
// IsIntegerResourceName returns true if the resource is measured in integer values
func IsIntegerResourceName(str string) bool {
return integerResources.Has(str) || IsExtendedResourceName(corev1.ResourceName(str))
}
// IsExtendedResourceName returns true if:
// 1. the resource name is not in the default namespace;
// 2. resource name does not have "requests." prefix,
// to avoid confusion with the convention in quota
// 3. it satisfies the rules in IsQualifiedName() after converted into quota resource name
func IsExtendedResourceName(name corev1.ResourceName) bool {
if IsNativeResource(name) || strings.HasPrefix(string(name), corev1.DefaultResourceRequestsPrefix) {
return false
}
// Ensure it satisfies the rules in IsQualifiedName() after converted into quota resource name
nameForQuota := fmt.Sprintf("%s%s", corev1.DefaultResourceRequestsPrefix, string(name))
if errs := validation.IsQualifiedName(nameForQuota); len(errs) != 0 {
return false
}
return true
}
// IsNativeResource returns true if the resource name is in the
// *kubernetes.io/ namespace. Partially-qualified (unprefixed) names are
// implicitly in the kubernetes.io/ namespace.
func IsNativeResource(name corev1.ResourceName) bool {
return !strings.Contains(string(name), "/") ||
strings.Contains(string(name), corev1.ResourceDefaultNamespacePrefix)
}