sigs.k8s.io/cluster-api@v1.7.1/controlplane/kubeadm/internal/cluster_labels.go (about)

     1  /*
     2  Copyright 2020 The Kubernetes Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package internal
    18  
    19  import (
    20  	clusterv1 "sigs.k8s.io/cluster-api/api/v1beta1"
    21  	controlplanev1 "sigs.k8s.io/cluster-api/controlplane/kubeadm/api/v1beta1"
    22  	"sigs.k8s.io/cluster-api/util/labels/format"
    23  )
    24  
    25  // ControlPlaneMachineLabelsForCluster returns a set of labels to add to a control plane machine for this specific cluster.
    26  func ControlPlaneMachineLabelsForCluster(kcp *controlplanev1.KubeadmControlPlane, clusterName string) map[string]string {
    27  	labels := map[string]string{}
    28  
    29  	// Add the labels from the MachineTemplate.
    30  	// Note: we intentionally don't use the map directly to ensure we don't modify the map in KCP.
    31  	for k, v := range kcp.Spec.MachineTemplate.ObjectMeta.Labels {
    32  		labels[k] = v
    33  	}
    34  
    35  	// Always force these labels over the ones coming from the spec.
    36  	labels[clusterv1.ClusterNameLabel] = clusterName
    37  	labels[clusterv1.MachineControlPlaneLabel] = ""
    38  	// Note: MustFormatValue is used here as the label value can be a hash if the control plane name is longer than 63 characters.
    39  	labels[clusterv1.MachineControlPlaneNameLabel] = format.MustFormatValue(kcp.Name)
    40  	return labels
    41  }