backup and restore certificates of your kubernetes cluster to avoid running into letsencrypt issuing limits

backup-restore-certificates.sh

#!/bin/bash

if [ -z "$1" -o -z "$2" ]; then
  echo "Usage: $0 backup|restore <cluster-name> [certificates.yml]"
  exit 1
fi
kube_context="kind-$2"
secrets="$3"

if [ "$1" == "backup" ]; then
  kubectl --context=$kube_context get secret --field-selector type=kubernetes.io/tls -A -o yaml > ${kube_context}-certificates.yml
  chmod go-rw ${kube_context}-certificates.yml
fi

if [ "$1" == "restore" -a -r "$secrets" ]; then
  kubectl --context=$kube_context apply -f $secrets
fi