Quick and dirty script to sync two pihole instances.

piholesync.sh

BKP_DATE=$(date +%Y%m%d_%H%M%S)
PIHOLE_ORIGIN_IP=192.168.0.10
PIHOLE_ORIGIN_USER=pi
LOCAL_USER=pep
PIHOLE_LOCAL_CONFIG=/home/pep/docker/config/pihole

GRAVITYDB_ORIGIN_PATH=/home/pi/docker/config/pihole/etc-pihole/gravity.db
GRAVITYDB_LOCAL_PATH=/home/pep/docker/config/pihole/etc-pihole/gravity.db
GRAVITYDB_LOCAL_BACKUP_PATH=/home/pep/docker/config/gravity.db.bkp.${BKP_DATE}

CNAMECONF_ORIGIN_PATH=/home/pi/docker/config/pihole/etc-dnsmasq.d/05-pihole-custom-cname.conf
CNAMECONF_LOCAL_PATH=/home/pep/docker/config/pihole/etc-dnsmasq.d/05-pihole-custom-cname.conf


echo "stoping pihole"
docker stop pihole

sudo chown -R $LOCAL_USER $PIHOLE_LOCAL_CONFIG
sudo chgrp -R $LOCAL_USER $PIHOLE_LOCAL_CONFIG

cp -v $GRAVITYDB_LOCAL_PATH $GRAVITYDB_LOCAL_BACKUP_PATH
echo "syncing pihole's..."
scp $PIHOLE_ORIGIN_USER@$PIHOLE_ORIGIN_IP:$GRAVITYDB_ORIGIN_PATH $GRAVITYDB_LOCAL_PATH
scp $PIHOLE_ORIGIN_USER@$PIHOLE_ORIGIN_IP:$CNAMECONF_ORIGIN_PATH $CNAMECONF_LOCAL_PATH

echo "restarting pihole"
docker start pihole