github.com/fabianvf/ocp-release-operator-sdk@v0.0.0-20190426141702-57620ee2f090/internal/util/k8sutil/k8sutil.go (about)

     1  // Copyright 2018 The Operator-SDK Authors
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package k8sutil
    16  
    17  import (
    18  	"fmt"
    19  
    20  	"k8s.io/client-go/rest"
    21  	"k8s.io/client-go/tools/clientcmd"
    22  	clientcmdapi "k8s.io/client-go/tools/clientcmd/api"
    23  )
    24  
    25  // GetKubeconfigAndNamespace returns the *rest.Config and default namespace defined in the
    26  // kubeconfig at the specified path. If no path is provided, returns the default *rest.Config
    27  // and namespace
    28  func GetKubeconfigAndNamespace(configPath string) (*rest.Config, string, error) {
    29  	var clientConfig clientcmd.ClientConfig
    30  	var apiConfig *clientcmdapi.Config
    31  	var err error
    32  	if configPath != "" {
    33  		apiConfig, err = clientcmd.LoadFromFile(configPath)
    34  		if err != nil {
    35  			return nil, "", fmt.Errorf("failed to load user provided kubeconfig: %v", err)
    36  		}
    37  	} else {
    38  		apiConfig, err = clientcmd.NewDefaultClientConfigLoadingRules().Load()
    39  		if err != nil {
    40  			return nil, "", fmt.Errorf("failed to get kubeconfig: %v", err)
    41  		}
    42  	}
    43  	clientConfig = clientcmd.NewDefaultClientConfig(*apiConfig, &clientcmd.ConfigOverrides{})
    44  	kubeconfig, err := clientConfig.ClientConfig()
    45  	if err != nil {
    46  		return nil, "", err
    47  	}
    48  	namespace, _, err := clientConfig.Namespace()
    49  	if err != nil {
    50  		return nil, "", err
    51  	}
    52  	return kubeconfig, namespace, nil
    53  }