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// Copyright 2020 Blake Covarrubias
//
// 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 main
import (
"log"
"os"
"path/filepath"
homedir "github.com/mitchellh/go-homedir"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/rest"
"k8s.io/client-go/tools/clientcmd"
)
func initAuthCreds() *rest.Config {
// Use Kubernetes service account for authentication when running in-cluster
var config *rest.Config
if _, err := os.Stat("/var/run/secrets/kubernetes.io/serviceaccount/token"); !os.IsNotExist(err) {
config, err = rest.InClusterConfig()
if err != nil {
panic(err.Error())
}
// Use kubeconfig for authentication when running out-of-cluster
} else {
// Uses the current context in kubeconfig
config, err = clientcmd.BuildConfigFromFlags(master, kubeconfig)
if err != nil {
log.Fatalln("Failed to read kubeconfig:", err)
}
}
return config
}
func kubeconfigPath() string {
var kubeconfigPath string
if home, _ := homedir.Dir(); home != "" {
kubeconfigPath = filepath.Join(home, ".kube", "config")
} else {
kubeconfigPath = ""
}
return kubeconfigPath
}
func newK8sClient() (*kubernetes.Clientset, error) {
// Creates the k8sClient
config := initAuthCreds()
k8sClient, err := kubernetes.NewForConfig(config)
if err != nil {
return nil, err
}
return k8sClient, nil
}
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