example-k8s-yaml-with-type.go

package main

import (
	"fmt"

	corev1 "k8s.io/api/core/v1"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"sigs.k8s.io/yaml"
)

func main() {
	// Marshal a ConfigMap object to YAML.
	cm1 := corev1.ConfigMap{
		TypeMeta: metav1.TypeMeta{
			Kind:       "ConfigMap",
			APIVersion: "v1",
		},
		ObjectMeta: metav1.ObjectMeta{
			Name:      "test-configmap",
			Namespace: "test-namespace",
		},
		Data: map[string]string{
			"key": "value",
		},
	}

	y, err := yaml.Marshal(cm1)
	if err != nil {
		fmt.Printf("err: %v\n", err)
		return
	}
	fmt.Println("Encoded YAML:")
	fmt.Println(string(y))
	y1 := `
kind: ConfigMap
apiVersion: v1
metadata:
  name: test-configmap
  namespace: test-namespace
data:
  key: value
`

	// Unmarshal the YAML back into another ConfigMap object.
	var cm2 corev1.ConfigMap
	err = yaml.Unmarshal([]byte(y1), &cm2)
	if err != nil {
		fmt.Printf("err: %v\n", err)
		return
	}
	fmt.Println("Decoded Object from YAML:")
	fmt.Println(cm2)
}