kyverno/test/cli/test-mutate/foreach/policies.yaml

apiVersion: kyverno.io/v1
kind: ClusterPolicy
metadata:
  name: foreach-json-patch
  annotations:
    pod-policies.kyverno.io/autogen-controllers: none
spec:
  rules:
    - name: add-security-context
      match:
        resources:
          kinds:
            - Pod
      preconditions:
      - key: "{{ request.operation }}"
        operator: Equals
        value: "CREATE"
      mutate:
        foreach: 
        - list: "request.object.spec.containers"
          patchesJson6902: |-
            - path: /spec/containers/{{elementIndex}}/securityContext
              op: add
              value: {"runAsNonRoot" : true}
---
apiVersion: kyverno.io/v1
kind: ClusterPolicy
metadata:
  name: mutate-images
  annotations:
    pod-policies.kyverno.io/autogen-controllers: none
spec:
  background: false
  rules:
  - name: test
    match:
      resources:
        kinds:
        - Pod
    mutate:
      foreach:
      - list: "request.object.spec.containers"
        patchStrategicMerge:
          spec:
            containers:
            - name: "{{ element.name }}"
              image: registry.digitalocean.com/runlevl4/{{ images.containers."{{element.name}}".name}}:{{images.containers."{{element.name}}".tag}}