=== echo.yaml 이 무엇을 만드나 ===
kind: Namespace
  name: header-lab
kind: Deployment
  name: echo
  namespace: header-lab
kind: Service
  name: echo
  namespace: header-lab
kind: Ingress
  name: echo
  namespace: header-lab
=== 적용 ===
namespace/header-lab created
deployment.apps/echo created
service/echo created
ingress.networking.k8s.io/echo created
echo-cd47dccc6-nq62j 1/1 Running kc-lab-2
echo-cd47dccc6-q46lk 1/1 Running kc-lab-1