Requirement:
As Pod Security Policy is enabled in Kubernetes Cluster, we need a PSP (Pod Security Policy) for Apache Httpd Server. How to create an Apache Httpd docker image, please refer to note. Http Server needs some special features other than normal applications.Here is a PSP example which is tested in OKE (Oracle Kubernetes Engine).
apiVersion: policy/v1beta1
kind: PodSecurityPolicy
metadata:
name: oke-restricted-psp
annotations:
seccomp.security.alpha.kubernetes.io/allowedProfileNames: 'docker/default,runtime/default'
seccomp.security.alpha.kubernetes.io/defaultProfileName: 'runtime/default'
spec:
privileged: false
allowedCapabilities:
- NET_BIND_SERVICE
# Required to prevent escalations to root.
allowPrivilegeEscalation: true
# Allow core volume types.
volumes:
- 'configMap'
- 'emptyDir'
- 'projected'
- 'secret'
- 'downwardAPI'
# Assume that persistentVolumes set up by the cluster admin are safe to use.
- 'persistentVolumeClaim'
hostNetwork: false
hostIPC: false
hostPID: false
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
fsGroup:
rule: 'MustRunAs'
ranges:
# Forbid adding the root group.
- min: 1
max: 65535
readOnlyRootFilesystem: false
---
# Cluster role which grants access to the restricted pod security policy
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
name: oke-restricted-psp-clsrole
rules:
- apiGroups:
- extensions
resourceNames:
- oke-restricted-psp
resources:
- podsecuritypolicies
verbs:
- use
