Add chaos monkey script

chaos.sh

@@ -0,0 +1,21 @@
+#!/bin/bash
+# Randomly delete pods in a Kubernetes namespace.
+# Pods with label 'chaos=immune' will be spared.
+set -ex
+
+: ${DELAY:=30}
+: ${NAMESPACE:=default}
+
+while true; do
+  kubectl \
+    --namespace "${NAMESPACE}" \
+    -o 'jsonpath={.items[*].metadata.name}' \
+    -l 'chaos!=immune' \
+    get pods | \
+      tr " " "\n" | \
+      shuf | \
+      head -n 1 |
+      xargs -t --no-run-if-empty \
+        kubectl --namespace "${NAMESPACE}" delete pod
+  sleep "${DELAY}"
+done