OPA Gatekeeper is not enforcing deployment replicas using oc or kubectl scale

Issue

• When I create a policy to limit the maximum number of replicas of a Deployment, oc/kubectl scale is not working, as it does not enforce a maximum number of replicas.

• I'm using replicalimits template to limit the number of replicas of a deployment, but it's not working. Gatekeeper should reject the scale like this:

  $ kubectl scale deployment hello --replicas=3
  Error from server ([maxreplicas] Review - Deployment 3 pods is higher than the maximum allowed of 2): admission webhook "validation.gatekeeper.sh" denied the request: [maxreplicas] Review - Deployment 3 pods is higher than the maximum allowed of 2