A demonstration of get pod with client-go

client-go-get-pod

/*
A demonstration of get pod using client-go
Based on client-go examples: https://github.com/kubernetes/client-go/tree/master/examples
To demonstrate, run this file with `go run <filename> --help` to see usage
*/

package main

import (
	"context"
	"flag"
	"fmt"
	"os"
	"path/filepath"

	v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/client-go/kubernetes"
	"k8s.io/client-go/tools/clientcmd"
	"k8s.io/client-go/util/homedir"
)

func main() {
	podName := flag.String("pod-name", "", "name of the required pod")
	namespaceName := flag.String("namespace", "", "namespace of the required pod")
	var kubeconfig *string
	if config, exist := os.LookupEnv("KUBECONFIG"); exist {
		kubeconfig = &config
	} else if home := homedir.HomeDir(); home != "" {
		kubeconfig = flag.String("kubeconfig", filepath.Join(home, ".kube", "config"), "(optional) absolute path to the kubeconfig file")
	} else {
		kubeconfig = flag.String("kubeconfig", "", "absolute path to the kubeconfig file")
	}
	flag.Parse()

	config, err := clientcmd.BuildConfigFromFlags("", *kubeconfig)
	if err != nil {
		panic(err)
	}
	clientset, err := kubernetes.NewForConfig(config)
	if err != nil {
		panic(err)
	}

	podClient := clientset.CoreV1().Pods(*namespaceName)
	fmt.Println("Getting pod...")
	result, err := podClient.Get(context.TODO(), *podName, v1.GetOptions{})
	if err != nil {
		panic(err)
	}
	// Example fields
	fmt.Printf("%+v\n", result.Name)
	fmt.Printf("%+v\n", result.Namespace)
	fmt.Printf("%+v\n", result.Spec.ServiceAccountName)
}