apiVersion: apps/v1
kind: Deployment
metadata:
  name: java-backend
spec:
  replicas: 3
  selector:
    matchLabels:
      app: java-backend
  template:
    metadata:
      labels:
        app: java-backend
    spec:
      affinity:
        podAntiAffinity:
          requiredDuringSchedulingIgnoredDuringExecution:
          - labelSelector:
              matchLabels:
                app: java-backend
            topologyKey: kubernetes.io/hostname
      containers:
      - name: app
        image: myregistry/java-backend:v1.2.0