sigs.k8s.io/prow@v0.0.0-20240503223140-c5e374dc7eb1/pkg/kube/cluster.go (about)

     1  /*
     2  Copyright 2018 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 kube
    18  
    19  import (
    20  	"fmt"
    21  
    22  	"github.com/sirupsen/logrus"
    23  
    24  	"k8s.io/client-go/kubernetes"
    25  	"k8s.io/client-go/rest"
    26  	"k8s.io/client-go/tools/clientcmd"
    27  
    28  	prowjobclientset "sigs.k8s.io/prow/pkg/client/clientset/versioned"
    29  
    30  	_ "k8s.io/client-go/plugin/pkg/client/auth"
    31  )
    32  
    33  // loadClusterConfig loads connection configuration
    34  // for the cluster we're deploying to. We prefer to
    35  // use in-cluster configuration if possible, but will
    36  // fall back to using default rules otherwise.
    37  func loadClusterConfig(masterURL, kubeConfig string) (*rest.Config, error) {
    38  	clusterConfig, err := clientcmd.BuildConfigFromFlags(masterURL, kubeConfig)
    39  	if err == nil {
    40  		return clusterConfig, nil
    41  	}
    42  
    43  	credentials, err := clientcmd.NewDefaultClientConfigLoadingRules().Load()
    44  	if err != nil {
    45  		return nil, fmt.Errorf("could not load credentials from config: %w", err)
    46  	}
    47  
    48  	clusterConfig, err = clientcmd.NewDefaultClientConfig(*credentials, &clientcmd.ConfigOverrides{}).ClientConfig()
    49  	if err != nil {
    50  		return nil, fmt.Errorf("could not load client configuration: %w", err)
    51  	}
    52  	return clusterConfig, nil
    53  }
    54  
    55  // GetKubernetesClient retrieves the Kubernetes cluster
    56  // client from within the cluster
    57  func GetKubernetesClient(masterURL, kubeConfig string) (kubernetes.Interface, error) {
    58  	config, err := loadClusterConfig(masterURL, kubeConfig)
    59  	if err != nil {
    60  		return nil, err
    61  	}
    62  
    63  	// generate the client based off of the config
    64  	client, err := kubernetes.NewForConfig(config)
    65  	if err != nil {
    66  		return nil, err
    67  	}
    68  
    69  	logrus.Info("Successfully constructed k8s client")
    70  	return client, nil
    71  }
    72  
    73  // GetKubernetesClient retrieves the Kubernetes cluster
    74  // client from within the cluster
    75  func GetProwJobClient(masterURL, kubeConfig string) (prowjobclientset.Interface, error) {
    76  	config, err := loadClusterConfig(masterURL, kubeConfig)
    77  	if err != nil {
    78  		return nil, err
    79  	}
    80  
    81  	prowjobClient, err := prowjobclientset.NewForConfig(config)
    82  	if err != nil {
    83  		return nil, err
    84  	}
    85  
    86  	logrus.Info("Successfully constructed k8s client")
    87  	return prowjobClient, nil
    88  }