DNS Propagation checker if !=

dns-ns-check.sh

#!/usr/bin/env bash
# Purpose: DNS Propagation checker, Check and report if DNS NS are not equal to what they should be

# make sure DNS utilities are installed
if hash dig 2>/dev/null; then
    echo "DNS utilities not installed"
    exit
fi

# domain to check
DOMAIN=wp-bullet.com

# pushbullet API key
PUSHBULLET=APIKEY

# array of desired nameservers in order, remember . at the end
NSUPDATED[0]=dawn.ns.cloudflare.com.
NSUPDATED[1]=burt.ns.cloudflare.com.

# make the DNS NS check
WPBULLETNS=($(dig $DOMAIN NS +short))

# variables for comparison checks
WPBULLETNSVAR=${WPBULLETNS[@]}
NSUPDATEDVAR=${NSUPDATED[@]}

# check if nameservers are NOT equal and send pushbullet notification if they do not match the desired name servers
if [ "$WPBULLETNSVAR" != "$NSUPDATEDVAR" ]; then
    curl --header "Access-Token: $PUSHBULLET" \
     --header 'Content-Type: application/json' \
     --data-binary '{"body":"DNS NS Changed: '"$WPBULLETNSVAR"'","title":"'"$DOMAIN"'","type":"note"}' \
     --request POST \
     https://api.pushbullet.com/v2/pushes
fi