Add Node Affinity

apiVersion: kyverno.io/v1
kind: ClusterPolicy
metadata:
  name: add-node-affinity
  annotations:
    policies.kyverno.io/title: Add Node Affinity
    policies.kyverno.io/category: Other
    policies.kyverno.io/severity: medium
    policies.kyverno.io/subject: Deployment
    kyverno.io/kyverno-version: 1.6.0
    kyverno.io/kubernetes-version: "1.21"
    policies.kyverno.io/description: Node affinity, similar to node selection, is a way to specify which node(s) on which Pods will be scheduled but based on more complex conditions. This policy will add node affinity to a Deployment and if one already exists an expression will be added to it.
spec:
  background: false
  rules:
    - name: add-node-affinity-deployment
      match:
        any:
          - resources:
              kinds:
                - Deployment
      mutate:
        patchesJson6902: |-
          - path: "/spec/template/spec/affinity/nodeAffinity/requiredDuringSchedulingIgnoredDuringExecution/nodeSelectorTerms/-1/matchExpressions/-1"
            op: add
            value:
              key: zone_weight
              operator: Lt
              values:
              - "400"