PodSecurityPolicy to Prevent hostPath Mount

psp.yml

apiVersion: policy/v1beta1
kind: PodSecurityPolicy
metadata:
  name: developers-psp
spec:
  privileged: false
  allowPrivilegeEscalation: false
  hostNetwork: false
  hostPID: false
  hostIPC: false
  seLinux: { 'rule': 'RunAsAny' }
  runAsUser: { 'rule': 'RunAsAny' }
  fsGroup: { 'rule': 'RunAsAny' }
  supplementalGroups: { 'rule': 'RunAsAny' }
  volumes:
  - 'emptyDir'
  - 'configMap'
  - 'secret'

---

apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: developers-psp-role
rules:
- apiGroups: ['policy']
  resources: ['podsecuritypolicies']
  verbs:     ['use']
  resourceNames:
  - developers-psp

---

apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: developers-sa-psp-binding
roleRef:
  kind: ClusterRole
  name: developers-psp-role
  apiGroup: rbac.authorization.k8s.io
subjects:
- kind: ServiceAccount
  name: developer-sa
  namespace: developers
- kind: ServiceAccount
  name: default
  namespace: developers