Continuously kill all pods except one randomly chosen.

kill-pods.sh

#!/bin/bash

app=$1

chosen_one=$(kubectl get pods -l app=$app | tail -1 | awk '{print $1}')
echo "Keeping alive $chosen_one"

while true; do
  pods=$(kubectl get pods -l app=$app | tail -n +2 | awk '{print $1}')
  for pod in $pods; do
    if [[ $pod != $chosen_one ]]; then
      echo "Killing $pod"
      kubectl delete po $pod
    fi
  done
  sleep 1
done