kubernetes/docs/user-guide/node-selection/pod-with-node-affinity.yaml

apiVersion: v1
kind: Pod
metadata:
  name: with-labels
  annotations:
    scheduler.alpha.kubernetes.io/affinity: >
      {
        "nodeAffinity": {
          "requiredDuringSchedulingIgnoredDuringExecution": {
            "nodeSelectorTerms": [
              {
                "matchExpressions": [
                  {
                    "key": "kubernetes.io/e2e-az-name",
                    "operator": "In",
                    "values": ["e2e-az1", "e2e-az2"]
                  }
                ]
              }
            ]
          }
        }
      }
    another-annotation-key: another-annotation-value
spec:
  containers:
  - name: with-labels
    image: gcr.io/google_containers/pause:2.0