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Michael Stanclift 2020-05-21 13:00:42 -05:00 committed by GitHub
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#!/bin/bash
# Gravity Sync by vmstan
# Must execute from a location in the home folder of the user who own's it (ex: /home/pi/gravity-sync)
# Configure certificate based SSH authentication between the Pihole HA nodes - it does not use passwords
# Tested against Pihole 5.0 GA on Raspbian Jesse and Ubuntu 20.04, but it should work on most configs
# More installation instructions available at https://vmstan.com/gravity-sync
# You must change the REMOTE_HOST and REMOTE_USER variables below to match your configuration
# STANDARD SETTINGS
REMOTE_HOST='192.168.7.5'
REMOTE_USER='ubuntu'
# PUSH SETTINGS
# CUSTOMIZATION
LOCAL_FOLDR='gravity-sync' # see above
SYNCING_LOG='gravity-sync.log' # see above
# PIHOLE DEFAULTS
PIHOLE_DIR='/etc/pihole' # default install directory
GRAVITY_FI='gravity.db' # this should not change
# SCRIPT COLORS
RED='\033[91m'
GREEN='\033[92m'
CYAN='\033[96m'
NC='\033[0m'
VERSION='1.1'
##############################################
# print title
# echo -e "${GREEN}Gravity Sync ${VERSION}${NC}"
case $# in
0)
echo -e "You must define the direction you want to replicate ${GRAVITY_FI}"
echo "Usage: $0 {pull|push}"
echo -e "${RED}Pull${NC} will copy the primary blocklists ($REMOTE_HOST) to this server"
echo -e "${RED}Push${NC} will force any changes made on this server to the primary"
exit 1
;;
1)
case $1 in
pull)
echo -e "${CYAN}Copying remote ${GRAVITY_FI} from ${REMOTE_HOST}${NC}"
rsync -v -e 'ssh -p 22' ${REMOTE_USER}@${REMOTE_HOST}:${PIHOLE_DIR}/${GRAVITY_FI} ~/${LOCAL_FOLDR}/${GRAVITY_FI}
echo -e "${CYAN}Replacing gravity.db on HA secondary${NC}"
sudo mv -v ${PIHOLE_DIR}/${GRAVITY_FI} ${PIHOLE_DIR}/${GRAVITY_FI}.backup
sudo cp -v ~/${LOCAL_FOLDR}/${GRAVITY_FI} ${PIHOLE_DIR}
sudo chmod 644 ${PIHOLE_DIR}/${GRAVITY_FI}
sudo chown pihole:pihole ${PIHOLE_DIR}/${GRAVITY_FI}
echo -e "${CYAN}Reloading configuration of HA secondary FTLDNS from new gravity.db${NC}"
pihole restartdns reloadlists
pihole restartdns
echo -e "${CYAN}Cleaning up things${NC}"
mv -v ~/${LOCAL_FOLDR}/${GRAVITY_FI} ~/${LOCAL_FOLDR}/${GRAVITY_FI}.last
date >> ~/${LOCAL_FOLDR}/${SYNCING_LOG}
echo -e "${GREEN}gravity.db pull completed${NC}"
;;
push)
echo -e "${RED}WARNING - DATA LOSS POSSIBLE${NC}"
echo -e "Are you sure you want to overwrite the primary node configuration on ${REMOTE_HOST}?"
select yn in "Yes" "No"; do
case $yn in
Yes )
echo "Replacing gravity.db on primary"
echo -e "${CYAN}Copying local ${GRAVITY_FI} to ${REMOTE_HOST}${NC}"
rsync --rsync-path="sudo rsync" -v -e 'ssh -p 22' ${PIHOLE_DIR}/${GRAVITY_FI} ${REMOTE_USER}@${REMOTE_HOST}:${PIHOLE_DIR}/${GRAVITY_FI}
echo -e "${CYAN}Applying permissions to remote gravity.db${NC}"
ssh ${REMOTE_USER}@${REMOTE_HOST} "sudo chmod 644 ${PIHOLE_DIR}/${GRAVITY_FI}"
ssh ${REMOTE_USER}@${REMOTE_HOST} "sudo chown pihole:pihole ${PIHOLE_DIR}/${GRAVITY_FI}"
echo -e "${CYAN}Reloading configuration on remote FTLDNS${NC}"
ssh ${REMOTE_USER}@${REMOTE_HOST} 'pihole restartdns reloadlists'
ssh ${REMOTE_USER}@${REMOTE_HOST} 'pihole restartdns'
echo -e "${GREEN}gravity.db push completed${NC}"
break;;
No )
echo "No changes have been made"
exit;;
esac
done
;;
*)
echo -e "${RED}'$1' is not a valid argument${NC}"
echo "Usage: $0 {pull|push}"
exit 2
;;
esac
;;
*)
echo -e "${RED}Too many arguments provided ($#)${NC}"
echo "Usage: $0 {pull|push}"
exit 3
;;
esac