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apiVersion: apps/v1
kind: ReplicaSet
metadata:
  name: frontend
  labels:
    app: nginx
    tier: frontend
spec:
  replicas: 10
  selector:
    matchLabels:
      tier: frontend
  template:
    metadata:
      labels:
        tier: frontend
    spec:
      containers:
      - name: nginx
        image: nginx
        ports:
        - containerPort: 80