k8s.io/test-infra@v0.0.0-20240520184403-27c6b4c223d8/gencred/pkg/kubeconfig/kubeconfig.go (about)

     1  /*
     2  Copyright 2019 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 kubeconfig
    18  
    19  import (
    20  	"fmt"
    21  
    22  	"k8s.io/client-go/kubernetes"
    23  	clientcmdapi "k8s.io/client-go/tools/clientcmd/api/v1"
    24  	"sigs.k8s.io/yaml"
    25  )
    26  
    27  // getServerAddress gets the address of the kubernetes cluster.
    28  func getServerAddress(clientset kubernetes.Interface) string {
    29  	url := clientset.Discovery().RESTClient().Get().URL()
    30  	return fmt.Sprintf("%s://%s", url.Scheme, url.Host)
    31  }
    32  
    33  // CreateKubeConfig creates a standard kube config.
    34  func CreateKubeConfig(clientset kubernetes.Interface, name string, caPEM []byte, authInfo clientcmdapi.AuthInfo) ([]byte, error) {
    35  	config := clientcmdapi.Config{
    36  		APIVersion: "v1",
    37  		Kind:       "Config",
    38  		Clusters: []clientcmdapi.NamedCluster{
    39  			{
    40  				Name: name,
    41  				Cluster: clientcmdapi.Cluster{
    42  					Server:                   getServerAddress(clientset),
    43  					CertificateAuthorityData: caPEM,
    44  				},
    45  			},
    46  		},
    47  		AuthInfos: []clientcmdapi.NamedAuthInfo{
    48  			{
    49  				Name:     name,
    50  				AuthInfo: authInfo,
    51  			},
    52  		},
    53  		Contexts: []clientcmdapi.NamedContext{
    54  			{
    55  				Name: name,
    56  				Context: clientcmdapi.Context{
    57  					Cluster:  name,
    58  					AuthInfo: name,
    59  				},
    60  			},
    61  		},
    62  		CurrentContext: name,
    63  	}
    64  
    65  	configYaml, err := yaml.Marshal(config)
    66  	if err != nil {
    67  		return nil, err
    68  	}
    69  
    70  	return configYaml, nil
    71  }