Digital Ocean - Update DNS records with Droplets internal private IPs and hostname

DO_upd_domain.sh

#!/bin/bash
#
# Digital Ocean - Update DNS records with Droplets internal private IPs and hostname
# DO_upd_domain.sh:
# 
# 2021-07-20 - v1.1 - By EthraZa <Allan Brazute>
# Add: Update only powers and --flush switch to recreate the domain
#
# 2021-07-15 - v1.0 - By EthraZa <Allan Brazute>
#

if [ ${1} ]; then
        DOMAIN="${1}"
        echo "Update domain ${1}"
else    
        echo "Usage: DO_upd_domain.sh DOMAIN.TLD [--flush] "
        echo "* Depends on working doctl and VPC "
        echo " "
        echo "Examples: "
        echo "- Only update or create new records: "
        echo " DO_upd_domain.sh lan.example.com "
        echo " "
        echo "- Delete domain with all records and recreate it: "
        echo " DO_upd_domain.sh lan.example.com --flush "
        echo " "
        exit 0
fi

if [ .${2} == ."--flush" ]; then
        echo "Delete ${DOMAIN}"
        doctl compute domain delete ${DOMAIN} -f
        echo "Create ${DOMAIN}"
        doctl compute domain create ${DOMAIN}
fi

for E in `doctl compute droplet list --format "Name,PrivateIPv4" --no-header|sed 's/ \+/,/'`; do
        NAME=`echo ${E}|cut -d',' -f1|cut -d'.' -f1`
        IP=`echo ${E}|cut -d',' -f2`

        if [ ${NAME} ] && [ ${IP} ]; then
                RID=`doctl compute domain records list i.ghsix.com.br --format "ID,Name" --no-header|grep -m1 -i "${NAME}"|cut -d" " -f1`

                if [ ${RID} ]; then
                        echo "Update ${NAME}"
                        doctl compute domain records update ${DOMAIN} --record-type "A" --record-name "${NAME}" --record-data "${IP}" --record-id "${RID}"
                else
                        echo "Create ${NAME}"
                        doctl compute domain records create ${DOMAIN} --record-type "A" --record-name "${NAME}" --record-data "${IP}"
                fi
        else
                echo "Skip ${NAME} ${IP}"
        fi
done