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| 1 | +#!/bin/sh |
| 2 | +mkdir -p /tmp/pss |
| 3 | +cat <<EOF > /tmp/pss/cluster-level-pss.yaml |
| 4 | +apiVersion: apiserver.config.k8s.io/v1 |
| 5 | +kind: AdmissionConfiguration |
| 6 | +plugins: |
| 7 | +- name: PodSecurity |
| 8 | + configuration: |
| 9 | + apiVersion: pod-security.admission.config.k8s.io/v1 |
| 10 | + kind: PodSecurityConfiguration |
| 11 | + defaults: |
| 12 | + enforce: "baseline" |
| 13 | + enforce-version: "latest" |
| 14 | + audit: "restricted" |
| 15 | + audit-version: "latest" |
| 16 | + warn: "restricted" |
| 17 | + warn-version: "latest" |
| 18 | + exemptions: |
| 19 | + usernames: [] |
| 20 | + runtimeClasses: [] |
| 21 | + namespaces: [kube-system] |
| 22 | +EOF |
| 23 | +cat <<EOF > /tmp/pss/cluster-config.yaml |
| 24 | +kind: Cluster |
| 25 | +apiVersion: kind.x-k8s.io/v1alpha4 |
| 26 | +nodes: |
| 27 | +- role: control-plane |
| 28 | + kubeadmConfigPatches: |
| 29 | + - | |
| 30 | + kind: ClusterConfiguration |
| 31 | + apiServer: |
| 32 | + extraArgs: |
| 33 | + admission-control-config-file: /etc/config/cluster-level-pss.yaml |
| 34 | + extraVolumes: |
| 35 | + - name: accf |
| 36 | + hostPath: /etc/config |
| 37 | + mountPath: /etc/config |
| 38 | + readOnly: false |
| 39 | + pathType: "DirectoryOrCreate" |
| 40 | + extraMounts: |
| 41 | + - hostPath: /tmp/pss |
| 42 | + containerPath: /etc/config |
| 43 | + # optional: if set, the mount is read-only. |
| 44 | + # default false |
| 45 | + readOnly: false |
| 46 | + # optional: if set, the mount needs SELinux relabeling. |
| 47 | + # default false |
| 48 | + selinuxRelabel: false |
| 49 | + # optional: set propagation mode (None, HostToContainer or Bidirectional) |
| 50 | + # see https://kubernetes.io/docs/concepts/storage/volumes/#mount-propagation |
| 51 | + # default None |
| 52 | + propagation: None |
| 53 | +EOF |
| 54 | +kind create cluster --name psa-with-cluster-pss --config /tmp/pss/cluster-config.yaml |
| 55 | +kubectl cluster-info --context kind-psa-with-cluster-pss |
| 56 | + |
| 57 | +# Wait for 15 seconds (arbitrary) ServiceAccount Admission Controller to be available |
| 58 | +sleep 15 |
| 59 | +cat <<EOF | |
| 60 | +apiVersion: v1 |
| 61 | +kind: Pod |
| 62 | +metadata: |
| 63 | + name: nginx |
| 64 | +spec: |
| 65 | + containers: |
| 66 | + - image: nginx |
| 67 | + name: nginx |
| 68 | + ports: |
| 69 | + - containerPort: 80 |
| 70 | +EOF |
| 71 | +kubectl apply -f - |
| 72 | + |
| 73 | +# Await input |
| 74 | +sleep 1 |
| 75 | +( bash -c 'true' 2>/dev/null && bash -c 'read -p "Press any key to continue... " -n1 -s' ) || \ |
| 76 | + ( printf "Press Enter to continue... " && read ) 1>&2 |
| 77 | + |
| 78 | +# Clean up |
| 79 | +printf "\n\nCleaning up:\n" 1>&2 |
| 80 | +set -e |
| 81 | +kubectl delete pod --all -n example --now |
| 82 | +kubectl delete ns example |
| 83 | +kind delete cluster --name psa-with-cluster-pss |
| 84 | +rm -f /tmp/pss/cluster-config.yaml |
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