get-deployments.go

package main

import (
	"context"
	"fmt"

	v1 "k8s.io/api/apps/v1"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/client-go/kubernetes"
	ctrl "sigs.k8s.io/controller-runtime"
)

func main() {
	ctx := context.Background()
	config := ctrl.GetConfigOrDie()
	clientset := kubernetes.NewForConfigOrDie(config)

	namespace := "default"
	items, err := GetDeployments(clientset, ctx, namespace)
	if err != nil {
		fmt.Println(err)
	} else {
		for _, item := range items {
			fmt.Printf("%+v\n", item)
		}
	}
}

func GetDeployments(clientset *kubernetes.Clientset, ctx context.Context,
    	namespace string) ([]v1.Deployment, error) {

	list, err := clientset.AppsV1().Deployments(namespace).
		List(ctx, metav1.ListOptions{})
	if err != nil {
		return nil, err
	}
	return list.Items, nil
}