backend-ref.yaml

apiVersion: kubevious.io/v1alpha1
kind: ClusterRule
metadata:
  name: http-route-backend-ref
spec:
  summary: |
    Validate HTTPRoute to Backend reference.
  target: |
    Api('gateway.networking.k8s.io')
      .Kind('HTTPRoute')
  categories:
    - k8s
    - gateway-api
    - http-route
    - backend
    - reference
  rule: |
    for(const rule of config.spec?.rules ?? [])
    {
      for(const backendRef of rule.backendRefs ?? [])
      {
        if (!backendRef.name)
        {
          error('backendRef.name is required');
        }
        else
        {
          const group = backendRef.group ?? "";
          const kind = backendRef.kind ?? "Service";
          const backendItem = Api(group)
                                .Kind(kind)
                                .name(backendRef.name)
                                .namespace(backendRef.namespace)
                                .single()
          if (!backendItem)
          {
            if (!helpers.gateway.isInternalService(group, kind, backendRef.name))
            {
              error(`Could not find backend reference: ${group} :: ${kind} :: ${backendRef.name}`);
            }
          }
        }
      }
    }