Move pkg/kubelet/apis to k8s.io/kubelet/pkg/apis

Kubernetes-commit: a5a6762d33743521e1696113143ea66b3072a224

pkg/apis/well_known_labels.go

@@ -0,0 +1,87 @@
+/*
+Copyright 2015 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.
+*/
+
+package apis
+
+import (
+	"strings"
+
+	v1 "k8s.io/api/core/v1"
+	"k8s.io/apimachinery/pkg/util/sets"
+)
+
+const (
+	// LabelOS is a label to indicate the operating system of the node.
+	// 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.
+	LabelOS = "beta.kubernetes.io/os"
+	// LabelArch is a label to indicate the architecture of the node.
+	// 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.
+	LabelArch = "beta.kubernetes.io/arch"
+)
+
+var kubeletLabels = sets.NewString(
+	v1.LabelHostname,
+	v1.LabelTopologyZone,
+	v1.LabelTopologyRegion,
+	v1.LabelFailureDomainBetaZone,
+	v1.LabelFailureDomainBetaRegion,
+	v1.LabelInstanceType,
+	v1.LabelInstanceTypeStable,
+	v1.LabelOSStable,
+	v1.LabelArchStable,
+
+	LabelOS,
+	LabelArch,
+)
+
+var kubeletLabelNamespaces = sets.NewString(
+	v1.LabelNamespaceSuffixKubelet,
+	v1.LabelNamespaceSuffixNode,
+)
+
+// KubeletLabels returns the list of label keys kubelets are allowed to set on their own Node objects
+func KubeletLabels() []string {
+	return kubeletLabels.List()
+}
+
+// KubeletLabelNamespaces returns the list of label key namespaces kubelets are allowed to set on their own Node objects
+func KubeletLabelNamespaces() []string {
+	return kubeletLabelNamespaces.List()
+}
+
+// IsKubeletLabel returns true if the label key is one that kubelets are allowed to set on their own Node object.
+// This checks if the key is in the KubeletLabels() list, or has a namespace in the KubeletLabelNamespaces() list.
+func IsKubeletLabel(key string) bool {
+	if kubeletLabels.Has(key) {
+		return true
+	}
+
+	namespace := getLabelNamespace(key)
+	for allowedNamespace := range kubeletLabelNamespaces {
+		if namespace == allowedNamespace || strings.HasSuffix(namespace, "."+allowedNamespace) {
+			return true
+		}
+	}
+
+	return false
+}
+
+func getLabelNamespace(key string) string {
+	if parts := strings.SplitN(key, "/", 2); len(parts) == 2 {
+		return parts[0]
+	}
+	return ""
+}