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

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