mirror of
https://github.com/vmstan/gravity-sync.git
synced 2024-08-30 18:22:11 +00:00
519 lines
13 KiB
Bash
Executable File
519 lines
13 KiB
Bash
Executable File
#!/bin/bash
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# GRAVITY SYNC BY VMSTAN #####################
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PROGRAM='Gravity Sync'
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VERSION='1.3.1'
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# Must execute from a location in the home folder of the user who own's it (ex: /home/pi/gravity-sync)
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# Configure certificate based SSH authentication between the Pi-hole HA nodes - it does not use passwords
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# Tested against Pihole 5.0 GA on Raspbian Buster and Ubuntu 20.04, but it should work on most configs
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# More installation instructions available at https://vmstan.com/gravity-sync
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# For the latest version please visit https://github.com/vmstan/gravity-sync under Releases
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# REQUIRED SETTINGS ##########################
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# You MUST define REMOTE_HOST and REMOTE_USER in a file called 'gravity-sync.conf'
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# You can copy the 'gravity-sync.conf.example' file in the script directory to get started
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# STANDARD VARIABLES #########################
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# GS Folder/File Locations
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LOCAL_FOLDR='gravity-sync' # must exist in running user home folder
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CONFIG_FILE='gravity-sync.conf' # must exist as explained above
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SYNCING_LOG='gravity-sync.log' # will be created in above folder
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CRONJOB_LOG='gravity-sync.cron' # only used if cron is configured to output to this file
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BACKUP_FOLD='backup' # must exist as subdirectory in LOCAL_FOLD
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# PH Folder/File Locations
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PIHOLE_DIR='/etc/pihole' # default install directory
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GRAVITY_FI='gravity.db' # this should not change
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##############################################
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### DO NOT CHANGE ANYTHING BELOW THIS LINE ###
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##############################################
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# Script Colors
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RED='\033[0;91m'
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GREEN='\033[0;92m'
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CYAN='\033[0;96m'
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YELLOW='\033[0;93m'
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PURPLE='\033[0;95m'
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NC='\033[0m'
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# Message Codes
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FAIL="[${RED}FAIL${NC}]"
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WARN="[${PURPLE}WARN${NC}]"
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GOOD="[${GREEN}DONE${NC}]"
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STAT="[${CYAN}EXEC${NC}]"
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INFO="[${YELLOW}INFO${NC}]"
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# FUNCTION DEFINITIONS #######################
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# Import Settings
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function import_gs {
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MESSAGE="Importing ${CONFIG_FILE} Settings"
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echo -en "${STAT} $MESSAGE"
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if [ -f $HOME/${LOCAL_FOLDR}/${CONFIG_FILE} ]
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then
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source $HOME/${LOCAL_FOLDR}/${CONFIG_FILE}
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error_validate
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MESSAGE="Using ${REMOTE_USER}@${REMOTE_HOST}"
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echo -e "${INFO} ${MESSAGE}"
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else
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echo -e "/r${FAIL} ${MESSAGE}"
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MESSAGE="${CONFIG_FILE} Missing"
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echo -e "${INFO} ${MESSAGE}"
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exit_nochange
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fi
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}
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# Update Function
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function update_gs {
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TASKTYPE='UPDATE'
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logs_export # dumps log prior to execution because script stops after successful pull
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MESSAGE="Requires GitHub Installation"
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echo -e "${INFO} ${MESSAGE}"
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git reset --hard
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git pull
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exit
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}
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# Developer Build Update
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function beta_gs {
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TASKTYPE='BETA'
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logs_export # dumps log prior to execution because script stops after successful pull
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MESSAGE="Requires GitHub Installation"
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echo -e "${INFO} ${MESSAGE}"
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git reset --hard
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git pull
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git checkout origin/development
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exit
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}
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# Pull Function
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function pull_gs {
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TASKTYPE='PULL'
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echo -e "${INFO} ${TASKTYPE} Requested"
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md5_compare
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MESSAGE="Pulling ${GRAVITY_FI} from ${REMOTE_HOST}"
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echo -en "${STAT} ${MESSAGE}"
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${SSHPASSWORD} rsync -v -e 'ssh -p 22' ${REMOTE_USER}@${REMOTE_HOST}:${PIHOLE_DIR}/${GRAVITY_FI} $HOME/${LOCAL_FOLDR}/${BACKUP_FOLD}/${GRAVITY_FI}.pull >/dev/null 2>&1
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error_validate
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MESSAGE="Backing Up ${GRAVITY_FI} on $HOSTNAME"
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echo -en "${STAT} ${MESSAGE}"
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cp -v ${PIHOLE_DIR}/${GRAVITY_FI} $HOME/${LOCAL_FOLDR}/${BACKUP_FOLD}/${GRAVITY_FI}.backup >/dev/null 2>&1
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error_validate
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MESSAGE="Replacing ${GRAVITY_FI} on $HOSTNAME"
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echo -en "${STAT} ${MESSAGE}"
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sudo cp -v $HOME/${LOCAL_FOLDR}/${BACKUP_FOLD}/${GRAVITY_FI}.pull ${PIHOLE_DIR}/${GRAVITY_FI} >/dev/null 2>&1
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error_validate
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MESSAGE="Setting Permissions on ${GRAVITY_FI}"
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echo -en "${STAT} ${MESSAGE}"
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sudo chmod 644 ${PIHOLE_DIR}/${GRAVITY_FI} >/dev/null 2>&1
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error_validate
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MESSAGE="Setting Ownership on ${GRAVITY_FI}"
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echo -en "${STAT} ${MESSAGE}"
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sudo chown pihole:pihole ${PIHOLE_DIR}/${GRAVITY_FI} >/dev/null 2>&1
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error_validate
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sleep 3
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MESSAGE="Updating FTLDNS Configuration"
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echo -en "${STAT} ${MESSAGE}"
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pihole restartdns reloadlists >/dev/null 2>&1
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error_validate
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MESSAGE="Reloading FTLDNS Services"
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echo -en "${STAT} ${MESSAGE}"
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pihole restartdns >/dev/null 2>&1
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error_validate
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logs_export
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exit_withchange
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}
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# Push Function
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function push_gs {
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TASKTYPE='PUSH'
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echo -e "${INFO} ${TASKTYPE} Requested"
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md5_compare
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echo -e "${WARN} Are you sure you want to overwrite the primary PH configuration on ${REMOTE_HOST}?"
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select yn in "Yes" "No"; do
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case $yn in
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Yes )
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MESSAGE="Backing Up ${GRAVITY_FI} from ${REMOTE_HOST}"
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echo -en "${STAT} ${MESSAGE}"
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${SSHPASSWORD} rsync -v -e 'ssh -p 22' ${REMOTE_USER}@${REMOTE_HOST}:${PIHOLE_DIR}/${GRAVITY_FI} $HOME/${LOCAL_FOLDR}/${BACKUP_FOLD}/${GRAVITY_FI}.push
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error_validate
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MESSAGE="Pushing ${GRAVITY_FI} to ${REMOTE_HOST}"
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echo -en "${STAT} ${MESSAGE}"
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${SSHPASSWORD} rsync --rsync-path="sudo rsync" -v -e 'ssh -p 22' ${PIHOLE_DIR}/${GRAVITY_FI} ${REMOTE_USER}@${REMOTE_HOST}:${PIHOLE_DIR}/${GRAVITY_FI}
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error_validate
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MESSAGE="Setting Permissions on ${GRAVITY_FI}"
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echo -en "${STAT} ${MESSAGE}"
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${SSHPASSWORD} ssh ${REMOTE_USER}@${REMOTE_HOST} "sudo chmod 644 ${PIHOLE_DIR}/${GRAVITY_FI}"
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error_validate
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MESSAGE="Setting Ownership on ${GRAVITY_FI}"
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echo -en "${STAT} ${MESSAGE}"
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${SSHPASSWORD} ssh ${REMOTE_USER}@${REMOTE_HOST} "sudo chown pihole:pihole ${PIHOLE_DIR}/${GRAVITY_FI}"
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error_validate
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sleep 3
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MESSAGE="Updating FTLDNS Configuration"
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echo -en "${STAT} ${MESSAGE}"
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${SSHPASSWORD} ssh ${REMOTE_USER}@${REMOTE_HOST} 'pihole restartdns reloadlists'
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error_validate
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MESSAGE="Reloading FTLDNS Services"
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echo -en "${STAT} ${MESSAGE}"
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${SSHPASSWORD} ssh ${REMOTE_USER}@${REMOTE_HOST} 'pihole restartdns'
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error_validate
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logs_export
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exit_withchange
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;;
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No )
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exit_nochange
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;;
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esac
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done
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}
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# Logging Functions
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## Check Log Function
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function logs_gs {
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echo -e "========================================================"
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echo -e "Recent Complete ${YELLOW}PULL${NC} Executions"
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tail -n 10 ${SYNCING_LOG} | grep PULL
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echo -e "Recent Complete ${YELLOW}UPDATE${NC} Executions"
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tail -n 10 ${SYNCING_LOG} | grep UPDATE
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echo -e "Recent Complete ${YELLOW}PUSH${NC} Executions"
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tail -n 10 ${SYNCING_LOG} | grep PUSH
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echo -e "========================================================"
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exit_nochange
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}
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## Crontab Logic
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function show_crontab {
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CRONPATH="$HOME/${LOCAL_FOLDR}/${CRONJOB_LOG}"
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MESSAGE="Replaying Last Cronjob"
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echo -e "${STAT} ${MESSAGE}"
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if [ -f ${CRONPATH} ]
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then
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if [ -s ${CRONPATH} ]
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echo -e "${GOOD} ${MESSAGE}"
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logs_crontab
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exit_nochange
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then
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echo -e "${FAIL} ${MESSAGE}"
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echo -e "${INFO} ${CRONPATH} appears empty"
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exit_nochange
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fi
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else
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echo -e "${FAIL} ${MESSAGE}"
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echo -e "${YELLOW}${CRONPATH}${NC} cannot be located"
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exit_nochange
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fi
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}
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## Check Last Crontab
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function logs_crontab {
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echo -e "========================================================"
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echo -e "========================================================"
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echo -e ""
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cat ${CRONJOB_LOG}
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echo -e ""
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echo -e "========================================================"
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echo -e "========================================================"
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}
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## Log Out
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function logs_export {
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echo -e "${INFO} Logging Timestamps to ${SYNCING_LOG}"
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# date >> $HOME/${LOCAL_FOLDR}/${SYNCING_LOG}
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echo -e $(date) "[${TASKTYPE}]" >> $HOME/${LOCAL_FOLDR}/${SYNCING_LOG}
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}
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# Validate Functions
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## Validate GS Folders
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function validate_gs_folders {
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MESSAGE="Locating $HOME/${LOCAL_FOLDR}"
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echo -en "${STAT} ${MESSAGE}"
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if [ -d $HOME/${LOCAL_FOLDR} ]
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then
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echo -e "/r${GOOD} ${MESSAGE}"
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else
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echo -e "/r${FAIL} ${MESSAGE}"
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exit_nochange
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fi
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MESSAGE="Locating $HOME/${LOCAL_FOLDR}/${BACKUP_FOLD}"
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echo -en "${STAT} ${MESSAGE}"
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if [ -d $HOME/${LOCAL_FOLDR}/${BACKUP_FOLD} ]
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then
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echo -e "/r${GOOD} ${MESSAGE}"
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else
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echo -e "/r${FAIL} ${MESSAGE}"
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exit_nochange
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fi
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}
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## Validate PH Folders
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function validate_ph_folders {
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MESSAGE="Locating ${PIHOLE_DIR}"
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echo -en "${STAT} ${MESSAGE}"
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if [ -d ${PIHOLE_DIR} ]
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then
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echo -e "/r${GOOD} ${MESSAGE}"
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else
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echo -e "/r${FAIL} ${MESSAGE}"
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exit_nochange
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fi
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}
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## Validate SSHPASS
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function validate_os_sshpass {
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echo -e "${INFO} Checking SSH Configuration"
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if hash sshpass 2>/dev/null
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then
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if test -z "$REMOTE_PASS"
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then
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SSHPASSWORD=''
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MESSAGE="Using SSH Key-Pair Authentication"
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else
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timeout 5 ssh -o StrictHostKeyChecking=no ${REMOTE_USER}@${REMOTE_HOST} 'exit' >/dev/null 2>&1
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if [ "$?" != "0" ]; then
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SSHPASSWORD="sshpass -p ${REMOTE_PASS}"
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MESSAGE="Using SSH Password Authentication"
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else
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SSHPASSWORD=''
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MESSAGE="Using SSH Key-Pair Authentication"
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fi
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fi
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else
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SSHPASSWORD=''
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MESSAGE="Using SSH Key-Pair Authentication"
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fi
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echo -e "${INFO} ${MESSAGE}"
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MESSAGE="Testing SSH Connection"
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echo -en "${STAT} ${MESSAGE}"
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timeout 5 ${SSHPASSWORD} ssh -o StrictHostKeyChecking=no ${REMOTE_USER}@${REMOTE_HOST} 'exit' >/dev/null 2>&1
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error_validate
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}
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# List GS Arguments
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function list_gs_arguments {
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echo -e "Usage: $0 [options]"
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echo -e "Example: '$0 pull'"
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echo -e ""
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echo -e "Replication Options:"
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echo -e " ${YELLOW}pull${NC} Sync the ${GRAVITY_FI} configuration on primary PH to this server"
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echo -e " ${YELLOW}push${NC} Force any changes made on this server back to the primary PH"
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echo -e " ${YELLOW}compare${NC} Check to see if there is any variance between primary and secondary"
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echo -e ""
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echo -e "Update Options:"
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echo -e " ${YELLOW}update${NC} Use GitHub to update this script to the latest version available"
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echo -e " ${YELLOW}beta${NC} Use GitHub to update this script to the latest beta version available"
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echo -e ""
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echo -e "Debug Options:"
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echo -e " ${YELLOW}version${NC} Display the version of the current installed script"
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echo -e " ${YELLOW}logs${NC} Show recent successful jobs"
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echo -e " ${YELLOW}cron${NC} Display output of last crontab execution"
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echo -e ""
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exit_nochange
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}
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# Exit Codes
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## No Changes Made
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function exit_nochange {
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echo -e "${INFO} ${PROGRAM} ${TASKTYPE} Aborting"
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exit 0
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}
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## Changes Made
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function exit_withchange {
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echo -e "${INFO} ${PROGRAM} ${TASKTYPE} Completed"
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exit 0
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}
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# Error Validation
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function error_validate {
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if [ "$?" != "0" ]; then
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echo -e "/r${FAIL} ${MESSAGE}"
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exit 1
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else
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echo -e "/r${GOOD} ${MESSAGE}"
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fi
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}
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# Output Version
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function show_version {
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echo -e "${INFO} ${PROGRAM} ${VERSION}"
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}
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# Look for Changes
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function md5_compare {
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echo -e "${INFO} Comparing ${GRAVITY_FI} Changes"
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MESSAGE="Analyzing Remote ${GRAVITY_FI}"
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echo -en "${STAT} ${MESSAGE}"
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primaryMD5=$(${SSHPASSWORD} ssh ${REMOTE_USER}@${REMOTE_HOST} 'md5sum /etc/pihole/gravity.db')
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error_validate
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MESSAGE="Analyzing Local ${GRAVITY_FI}"
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echo -en "${STAT} ${MESSAGE}"
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secondMD5=$(md5sum ${PIHOLE_DIR}/${GRAVITY_FI})
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error_validate
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if [ "$primaryMD5" == "$secondMD5" ]
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then
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echo -e "${INFO} No Changes in ${GRAVITY_FI}"
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exit_nochange
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else
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echo -e "${INFO} Changes Detected in ${GRAVITY_FI}"
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fi
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}
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# SCRIPT EXECUTION ###########################
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MESSAGE="Evaluating Script Arguments"
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echo -en "${STAT} ${MESSAGE}"
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case $# in
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0)
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echo -e "\r${FAIL} ${MESSAGE}"
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list_gs_arguments
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;;
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1)
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case $1 in
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pull)
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echo -e "\r${GOOD} ${MESSAGE}"
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import_gs
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MESSAGE="Validating Folder Configuration"
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echo -e "${INFO} ${MESSAGE}"
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validate_gs_folders
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validate_ph_folders
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validate_os_sshpass
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pull_gs
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exit
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;;
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push)
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echo -e "\r${GOOD} ${MESSAGE}"
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import_gs
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echo -e "${INFO} Validating Folder Configuration"
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validate_gs_folders
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validate_ph_folders
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validate_os_sshpass
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push_gs
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exit
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;;
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version)
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TASKTYPE='VERSION'
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show_version
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exit_nochange
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;;
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update)
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# TASKTYPE='UPDATE'
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echo -e "\r${GOOD} ${MESSAGE}"
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echo -e "${INFO} Update Requested"
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update_gs
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exit_nochange
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;;
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beta)
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# TASKTYPE='BETA'
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echo -e "\r${GOOD} ${MESSAGE}"
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echo -e "${INFO} Beta Update Requested"
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beta_gs
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exit_nochange
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;;
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logs)
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TASKTYPE='LOGS'
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echo -e "\r${GOOD} ${MESSAGE}"
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MESSAGE="Logs Requested"
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echo -e "${INFO} ${MESSAGE}"
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logs_gs
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;;
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compare)
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TASKTYPE='COMPARE'
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echo -e "\r${GOOD} ${MESSAGE}"
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import_gs
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echo -e "${INFO} Validating Folder Configuration"
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validate_gs_folders
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validate_ph_folders
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validate_os_sshpass
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md5_compare
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;;
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cron)
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TASKTYPE='CRON'
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echo -e "\r${GOOD} ${MESSAGE}"
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show_crontab
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;;
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*)
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echo -e "\r${FAIL} ${MESSAGE}"
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list_gs_arguments
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exit_nochange
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;;
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esac
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;;
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*)
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echo -e "\r${FAIL} ${MESSAGE}"
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list_gs_arguments
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exit_nochange
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;;
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esac |