node-affinity.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    app: node-affinity
  name: node-affinity
spec:
  replicas: 1
  selector:
    matchLabels:
      app: node-affinity
  template:
    metadata:
      labels:
        app: node-affinity
    spec:
      affinity:
        nodeAffinity:
          requiredDuringSchedulingIgnoredDuringExecution:
            nodeSelectorTerms:
            - matchExpressions:
              - key: failure-domain.beta.kubernetes.io/zone
                operator: In
                values:
                - us-west-2b
                - us-west-2c
          preferredDuringSchedulingIgnoredDuringExecution:
          - weight: 1
            preference:
              matchExpressions:
              - key: beta.kubernetes.io/instance-type
                operator: In
                values:
                - t3.large
      containers:
      - image: nginx
        name: node-affinity