deletes all records in a Route53 hosted zone saving a backup to your home directory

purge-route53-zone.sh

#!/bin/bash
#
# purge-route53-zone.sh
#   deletes all records in a Route53 hosted zone
#   saving a backup to your home directory
#
# Usage: 
#   purge-route53-zone.sh HOSTED_ZONE_ID
#
# Requirements:
#   aws-cli
#   jq
#

HOSTED_ZONE=$1

# setup workspace
cd `mktemp -d`

aws route53 list-resource-record-sets --hosted-zone-id $HOSTED_ZONE \
  | jq -c '.ResourceRecordSets[] | select((.Type != "NS") and (.Type != "SOA")) | {"Action":"DELETE","ResourceRecordSet":.}' > records

cp records ~/$HOSTED_ZONE.zone-backup
split -l 500 records
rm -rf records
ls | while read line; do
  echo "purging $(wc -l $line | grep -o "[0-9]*") records"
  record_sets=`mktemp --suffix="-$line"`
  jq -s '{"Comment": "purging hosted zone","Changes":.}' $line > $record_sets
  aws route53 change-resource-record-sets --hosted-zone-id $HOSTED_ZONE --change-batch=file://$record_sets
done