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k8sutil.go
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k8sutil.go
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// Copyright 2018 The Operator-SDK 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 k8sutil
import (
"fmt"
"k8s.io/client-go/rest"
"k8s.io/client-go/tools/clientcmd"
clientcmdapi "k8s.io/client-go/tools/clientcmd/api"
)
// GetKubeconfigAndNamespace returns the *rest.Config and default namespace defined in the
// kubeconfig at the specified path. If no path is provided, returns the default *rest.Config
// and namespace
func GetKubeconfigAndNamespace(configPath string) (*rest.Config, string, error) {
var clientConfig clientcmd.ClientConfig
var apiConfig *clientcmdapi.Config
var err error
if configPath != "" {
apiConfig, err = clientcmd.LoadFromFile(configPath)
if err != nil {
return nil, "", fmt.Errorf("failed to load user provided kubeconfig: %v", err)
}
} else {
apiConfig, err = clientcmd.NewDefaultClientConfigLoadingRules().Load()
if err != nil {
return nil, "", fmt.Errorf("failed to get kubeconfig: %v", err)
}
}
clientConfig = clientcmd.NewDefaultClientConfig(*apiConfig, &clientcmd.ConfigOverrides{})
kubeconfig, err := clientConfig.ClientConfig()
if err != nil {
return nil, "", err
}
namespace, _, err := clientConfig.Namespace()
if err != nil {
return nil, "", err
}
return kubeconfig, namespace, nil
}