apiVersion: kyverno.io/v1
kind: ClusterPolicy
metadata:
  name: disallow-latest-tag
  annotations:
    policies.kyverno.io/category: Best Practices
    policies.kyverno.io/description: >-
      The ':latest' tag is mutable and can lead to unexpected errors if the
      image changes. A best practice is to use an immutable tag that maps to
      a specific version of an application pod.
spec:
  validationFailureAction: audit
  rules:
  - name: validate-image-tag
    match:
      resources:
        kinds:
        - Pod
    validate:
      message: "Using a mutable image tag e.g. 'latest' is not allowed."
      pattern:
        spec:
          containers:
          - image: "!*:latest"
---
apiVersion: kyverno.io/v1
kind: ClusterPolicy
metadata:
  name: drop-all-capabilities
  annotations:
    policies.kyverno.io/scored: "false"
spec:
  validationFailureAction: audit
  rules:
    - name: require-drop-all
      match:
        any:
        - resources:
            kinds:
              - Pod
      preconditions:
        all:
        - key: "{{ request.operation }}"
          operator: NotEquals
          value: DELETE
      validate:
        message: >-
          Containers must drop `ALL` capabilities.
        foreach:
          - list: request.object.spec.[ephemeralContainers, initContainers, containers][]
            deny:
              conditions:
                all:
                - key: ALL
                  operator: AnyNotIn
                  value: "{{ element.securityContext.capabilities.drop || '' }}"
