apiVersion: apps/v1
kind: ReplicaSet
metadata:
  name: app1
  namespace: ns-test
spec:
  replicas: 3
  selector:
    matchLabels:
      app.kubernetes.io/name: app1
  template:
    metadata:
      labels:
        app.kubernetes.io/name: app1
    spec:
      containers:
        - name: nginx
          image: nginx