kyverno/test/cli/test-mutate/patched-resource/policy.yaml

---
apiVersion: kyverno.io/v1
kind: ClusterPolicy
metadata:
  name: add-default-resources
spec:
  admission: true
  background: false
  rules:
  - match:
      any:
      - resources:
          kinds:
          - Pod
    mutate:
      patchStrategicMerge:
        spec:
          containers:
          - (name): '*'
            resources:
              requests:
                +(cpu): 100m
                +(memory): 100Mi
    name: add-default-requests
    preconditions:
      any:
      - key: '{{request.operation}}'
        operator: AllIn
        value:
        - CREATE
        - UPDATE