/
client.go
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/
client.go
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// Copyright 2017 Istio 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 kube implements the shared and reusable library for Kubernetes
package kube
import (
"k8s.io/client-go/kubernetes"
_ "k8s.io/client-go/plugin/pkg/client/auth/gcp" // import OIDC cluster authentication plugin, e.g. for Tectonic
_ "k8s.io/client-go/plugin/pkg/client/auth/oidc"
restclient "k8s.io/client-go/rest"
"k8s.io/client-go/tools/clientcmd"
clientcmdapi "k8s.io/client-go/tools/clientcmd/api" // import GKE cluster authentication plugin
)
// CreateInterface is a helper function to create Kubernetes interface from kubeconfig file
func CreateInterface(kubeconfig string) (kubernetes.Interface, error) {
if len(kubeconfig) == 0 {
// Avoid the confusing "Things might not work" message
restConfig, err := restclient.InClusterConfig()
if err != nil {
return nil, err
}
return kubernetes.NewForConfig(restConfig)
}
restConfig, err := clientcmd.BuildConfigFromFlags("", kubeconfig)
if err != nil {
return nil, err
}
return kubernetes.NewForConfig(restConfig)
}
// CreateInterfaceFromClusterConfig is a helper function to create Kubernetes interface from in memory cluster config struct
func CreateInterfaceFromClusterConfig(clusterConfig *clientcmdapi.Config) (kubernetes.Interface, error) {
return createInterface(clusterConfig)
}
// createInterface is new function which creates rest config and kubernetes interface
// from passed cluster's config struct
func createInterface(clusterConfig *clientcmdapi.Config) (kubernetes.Interface, error) {
clientConfig := clientcmd.NewDefaultClientConfig(*clusterConfig, &clientcmd.ConfigOverrides{})
rest, err := clientConfig.ClientConfig()
if err != nil {
return nil, err
}
return kubernetes.NewForConfig(rest)
}