Check DR is a script designed to check if the current server is in a production or DR environment.

It does this by comparing the current external IP address with a whitelist of ip addresses.

If the current external IP address is in the whitelist it exits with a status of 0

if the current external IP is not in the whitelist it exits with a status of 1

heres an example bash script using it

#!/bin/bash
check_dr
if [[ $? == 0 ]]; then
    echo "system is in production do more commands here"
else
    echo "system is at dr exit processing now"
    exit
fi

check_dr with no options will just run the check

check_dr -a add an ip address to the white list

check_dr -d delete an ip address from the white list

check_dr -l list the current external ip address and display the whitelist

check_dr -? display the help