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88 lines
2.5 KiB
Go
88 lines
2.5 KiB
Go
/*
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Copyright 2015 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package apis
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import (
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"strings"
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"k8s.io/api/core/v1"
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"k8s.io/apimachinery/pkg/util/sets"
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)
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const (
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// LabelOS is a label to indicate the operating system of the node.
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// The OS labels are promoted to GA in 1.14. kubelet applies GA labels and stop applying the beta OS labels in Kubernetes 1.19.
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LabelOS = "beta.kubernetes.io/os"
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// LabelArch is a label to indicate the architecture of the node.
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// The Arch labels are promoted to GA in 1.14. kubelet applies GA labels and stop applying the beta Arch labels in Kubernetes 1.19.
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LabelArch = "beta.kubernetes.io/arch"
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)
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var kubeletLabels = sets.NewString(
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v1.LabelHostname,
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v1.LabelZoneFailureDomainStable,
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v1.LabelZoneRegionStable,
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v1.LabelZoneFailureDomain,
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v1.LabelZoneRegion,
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v1.LabelInstanceType,
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v1.LabelInstanceTypeStable,
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v1.LabelOSStable,
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v1.LabelArchStable,
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LabelOS,
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LabelArch,
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)
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var kubeletLabelNamespaces = sets.NewString(
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v1.LabelNamespaceSuffixKubelet,
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v1.LabelNamespaceSuffixNode,
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)
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// KubeletLabels returns the list of label keys kubelets are allowed to set on their own Node objects
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func KubeletLabels() []string {
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return kubeletLabels.List()
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}
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// KubeletLabelNamespaces returns the list of label key namespaces kubelets are allowed to set on their own Node objects
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func KubeletLabelNamespaces() []string {
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return kubeletLabelNamespaces.List()
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}
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// IsKubeletLabel returns true if the label key is one that kubelets are allowed to set on their own Node object.
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// This checks if the key is in the KubeletLabels() list, or has a namespace in the KubeletLabelNamespaces() list.
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func IsKubeletLabel(key string) bool {
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if kubeletLabels.Has(key) {
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return true
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}
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namespace := getLabelNamespace(key)
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for allowedNamespace := range kubeletLabelNamespaces {
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if namespace == allowedNamespace || strings.HasSuffix(namespace, "."+allowedNamespace) {
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return true
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}
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}
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return false
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}
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func getLabelNamespace(key string) string {
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if parts := strings.SplitN(key, "/", 2); len(parts) == 2 {
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return parts[0]
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}
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return ""
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}
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