Automatically clean up after deploying PSA examples

Readers who want to skip the clean up can edit these scripts; it seems
fair to assume that a reader who wants that would know how to edit a
shell script and delete lines from it.

Author: Tim Bannister

content/en/examples/security/kind-with-cluster-level-baseline-pod-security.sh

@@ -53,6 +53,7 @@ nodes:
 EOF
 kind create cluster --name psa-with-cluster-pss --config /tmp/pss/cluster-config.yaml
 kubectl cluster-info --context kind-psa-with-cluster-pss
+
 # Wait for 15 seconds (arbitrary) ServiceAccount Admission Controller to be available
 sleep 15
 cat <<EOF |
@@ -68,3 +69,14 @@ spec:
         - containerPort: 80
 EOF
 kubectl apply -f -
+
+# Wait
+sleep 3
+
+# Clean up
+printf "\n\nCleaning up:\n" 1>&2
+set -e
+kubectl delete pod --all -n example --now
+kubectl delete ns example
+kind delete cluster --name psa-with-cluster-pss
+rm -f /tmp/pss/cluster-config.yaml

content/en/examples/security/kind-with-namespace-level-baseline-pod-security.sh

@@ -1,9 +1,11 @@
 #!/bin/sh
 kind create cluster --name psa-ns-level
 kubectl cluster-info --context kind-psa-ns-level
-# Wait for 15 seconds (arbitrary) ServiceAccount Admission Controller to be available
+# Wait for 15 seconds (arbitrary) for ServiceAccount Admission Controller to be available
 sleep 15
-kubectl create ns example
+
+# Create and label the namespace
+kubectl create ns example || exit 1 # if namespace exists, don't do the next steps
 kubectl label --overwrite ns example \
   pod-security.kubernetes.io/enforce=baseline \
   pod-security.kubernetes.io/enforce-version=latest \
@@ -26,3 +28,13 @@ spec:
         - containerPort: 80
 EOF
 kubectl apply -n example -f -
+
+# Wait
+sleep 3
+
+# Clean up
+printf "\n\nCleaning up:\n" 1>&2
+set -e
+kubectl delete pod --all -n example --now
+kubectl delete ns example
+kind delete cluster --name psa-ns-level