apiVersion: policy/v1beta1
kind: PodSecurityPolicy
metadata:
  name: pod-security-policy-restricted-psp
  annotations:
    seccomp.security.alpha.kubernetes.io/allowedProfileNames: 'docker/default,runtime/default'
    apparmor.security.beta.kubernetes.io/allowedProfileNames: 'runtime/default'
    seccomp.security.alpha.kubernetes.io/defaultProfileName: 'runtime/default'
    apparmor.security.beta.kubernetes.io/defaultProfileName: 'runtime/default'
spec:
  allowedHostPaths:
    # This allows "/foo", "/foo/", "/foo/bar" etc., but
    # disallows "/fool", "/etc/foo" etc.
    # "/foo/../" is never valid.
    - pathPrefix: "/foo"
      readOnly: true  # only allow read-only mounts
  allowPrivilegeEscalation: false
  # This is redundant with non-root + disallow privilege escalation,
  # but we can provide it for defense in depth.
  fsGroup:
    rule: 'MustRunAs'
    ranges:
      # Forbid adding the root group.
      - min: 1
        max: 65535
  hostIPC: false
  hostNetwork: false
  hostPID: false
  privileged: false
  readOnlyRootFilesystem: false
  # Required to prevent escalations to root.
  requiredDropCapabilities:
    - ALL
  runAsUser:
    # Require the container to run without root privileges.
    rule: 'MustRunAsNonRoot'
  seLinux:
    # This policy assumes the nodes are using AppArmor rather than SELinux.
    rule: 'RunAsAny'
  supplementalGroups:
    rule: 'MustRunAs'
    ranges:
      # Forbid adding the root group.
      - min: 1
        max: 65535
  # Allow core volume types.
  volumes:
    - 'configMap'
    - 'emptyDir'
    - 'projected'
    - 'secret'
    - 'downwardAPI'
    # Assume that persistentVolumes set up by the cluster admin are safe to use.
    - 'persistentVolumeClaim'
