Test Dead Route53 DNS Records

dns-check.sh

#!/bin/bash

DOMAIN=$1
PORT=$2
TYPES=(A CNAME)

# resolve zone id
ZONE=$(aws route53 list-hosted-zones --query 'HostedZones[?Name==`'$DOMAIN'.`].Id' --output text)
if [[ -z "$ZONE" ]]; then
  echo "Unrecognized domain: $1" >&2
  exit 1
fi

for type in "${TYPES[@]}"; do
  RECORDS=$(aws route53 list-resource-record-sets --hosted-zone-id "${ZONE##*/}" --query 'ResourceRecordSets[?Type==`'$type'`].[Name]' --output text)
  IFS=$'\n'
  for r in $RECORDS; do
    HOST=$(echo "$r" | sed 's/\.$//')
    (nc -vz -w1 "$HOST" $PORT >/dev/null 2>&1 || echo "$HOST") &
  done
done

wait $(jobs -p)