Exigir item de array usando a política Kyverno

Question

Tentando criar uma política Kyverno que requer determinados valores de array. Eles têm exemplos de "mapas", como rótulos, mas não vi nada específico sobre arrays.

Aqui está um exemplo de Applicationrecurso:

apiVersion: argoproj.io/v1alpha1
kind: Application
metadata:
  name: authentication
  namespace: openshift-gitops
spec:
  destination:
    server: 'https://kubernetes.default.svc'
  project: cluster-config
  source:
    path: cluster-config/authentication
    repoURL: 'https://example.com/scm/gitops/openshift-prod-cluster.git'
    targetRevision: master
  syncPolicy:
    automated:
      selfHeal: true
    retry:
      backoff:
        duration: 15s
        factor: 2
        maxDuration: 5m
      limit: 15
    syncOptions:
      - ServerSideApply=true
      - Validate=false
      - FailOnSharedResource=true

Esta é minha última tentativa, mas ambas as regras falham em todos os aplicativos:

apiVersion: kyverno.io/v1
kind: ClusterPolicy
metadata:
  name: require-server-side-sync
  annotations:
    policies.kyverno.io/title: Use Server-Side Sync
    policies.kyverno.io/category: Argo
    policies.kyverno.io/severity: low
    policies.kyverno.io/subject: Application
    kyverno.io/kyverno-version: 1.6.0
    policies.kyverno.io/minversion: 1.6.0
    kyverno.io/kubernetes-version: "1.23"
    policies.kyverno.io/description: >-
      By default, Argo CD executes `kubectl apply` operation to apply the configuration stored in Git. 
      This is a client side operation that relies on `kubectl.kubernetes.io/last-applied-configuration` annotation to 
      store the previous resource state. However, using server-side sync avoids issues with `kubectl.kubernetes.io/last-applied-configuration`
      growing so large that it breaks standard syncing, and allows patching of existing cluster resources that are not fully
      managed by Argo. Certain patch yamls may not be "valid" according to their resource definition and will need client-side
      validation to be disabled in order to work. (`kube-api` will still perform server-side validation of the patched resource before applying the change.)
spec:
  validationFailureAction: Audit
  background: true
  rules:
    - name: enable-server-side-sync
      match:
        any:
          - resources:
              kinds:
                - Application
      validate:
        message: >-
          Server-side sync option must be enabled.
        pattern:
          - spec:
              syncPolicy:
                ^(syncOptions):
                - ServerSideApply: true
    - name: disable-client-side-validation
      match:
        any:
          - resources:
              kinds:
                - Application
      validate:
        message: >-
          client-side validation must be disabled
        pattern:
          - spec:
              syncPolicy:
                syncOptions:
                  - Validate=false

então qual é a melhor maneira de exigir um valor de array?

Answer 1

Infelizmente, oÂncora de existênciaatualmente não suporta uma matriz de strings, apenas uma matriz de objetos. Eu criei um aprimoramento para adicionar isso. Por enquanto, você pode usar uma instrução deny com uma expressão JMESPath simples para verificar se suas strings estão presentes.

apiVersion: kyverno.io/v2beta1
kind: ClusterPolicy
metadata:
  name: require-server-side-sync
spec:
  validationFailureAction: Enforce
  background: true
  rules:
    - name: enable-server-side-sync
      match:
        any:
          - resources:
              kinds:
                - Application
      validate:
        message: Server-side sync option must be enabled.
        deny:
          conditions:
            all:
            - key: ServerSideApply=true
              operator: AnyNotIn
              value: "{{ request.object.spec.syncPolicy.syncOptions[] }}"
    - name: disable-client-side-validation
      match:
        any:
          - resources:
              kinds:
                - Application
      validate:
        message: client-side validation must be disabled
        deny:
          conditions:
            all:
            - key: Validate=false
              operator: AnyNotIn
              value: "{{ request.object.spec.syncPolicy.syncOptions[] }}"