Stop Privileged containers with Pod Security Policy

Delete all PSPs
```
kubectl delete psp --all
```
Verify that PodSecurityPolicy admission controller enabled
```
minikube ssh
sudo cat /etc/kubernetes/manifests/kube-apiserver.yaml | grep admission
```
Verify that the outcome of the above command include PodSecurityPolicy

Create Pod and verify that it will not be recreated because of missing PSP

kubectl apply -f pod.yaml

The server will return the following message because there is no PSP matches that can be used

Error from server (Forbidden): error when creating "pod.yaml": pods "psp-nginx" is forbidden: no providers available to validate pod request

Create example PSP that does NOT permit running privileged containers
```
kubectl apply -f example-psp.yaml
```

Try scheduling the pod again

kubectl apply -f pod.yaml

The request will fail because the PSP doesn't enable privileged containers:

Error from server (Forbidden): error when creating "pod.yaml": pods "psp-nginx" is forbidden: unable to validate against any pod security policy: [spec.containers[0].securityContext.privileged: Invalid value: true: Privileged containers are not allowed]