apiVersion: v1
kind: Pod
metadata:
  name: web-near-cache
  namespace: affinity-demo
  labels:
    app: web-near-cache
spec:
  affinity:
    podAffinity:
      requiredDuringSchedulingIgnoredDuringExecution:
        - labelSelector:
            matchExpressions:
              - key: app
                operator: In
                values:
                  - cache
          topologyKey: kubernetes.io/hostname
  containers:
    - name: pause
      image: registry.k8s.io/pause:3.10
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: web-spread
  namespace: affinity-demo
spec:
  replicas: 2
  selector:
    matchLabels:
      app: web-spread
  template:
    metadata:
      labels:
        app: web-spread
    spec:
      affinity:
        podAntiAffinity:
          requiredDuringSchedulingIgnoredDuringExecution:
            - labelSelector:
                matchLabels:
                  app: web-spread
              topologyKey: kubernetes.io/hostname
      containers:
        - name: pause
          image: registry.k8s.io/pause:3.10