Script that safely creates the backups for the EZO.TV Minecraft server

ezobackup.sh

#!/bin/bash

# Requirements:
# - mcrcon: https://github.com/Tiiffi/mcrcon
# - sentry-cli: https://github.com/getsentry/sentry-cli

# configure

SENTRY_DSN=
export SENTRY_DSN

MCRCON_HOST=127.0.0.1
export MCRCON_HOST

MCRCON_PASS=
export MCRCON_PASS

LOG_FILE="/tmp/last_ezobackup.log"

# setup sentry

eval "$(/opt/ezobackup/sentry-cli bash-hook)"

# only minecraft user should run this script

if [[ "$EUID" -ne $(id -u minecraft) ]]; then
	echo "De minecraft user pls"
	exit 1
fi

# Setup logging stuff

rm -f $LOG_FILE # remove leftover from last run

function log_print {
	echo "$1" | tee -a "$LOG_FILE"
}


function die {
	log_print "$1"
	/opt/ezobackup/sentry-cli send-event -m "$1" --logfile "$LOG_FILE"
	exit 0 # sentry should already took care of reporting the error
}

# start backup!!!

# prepare
FILENAME="backup_"$(date +"%Y_%m_%d_%H_%M_%S")".tar.gz" # Do not forget to adjust the delete rule bellow
log_print "Creating $FILENAME"


if ! /usr/local/bin/mcrcon "say Biztonsági mentés..."; then
	die "Could not communicate with the minecraft server!"
fi

log_print "Flushing map, and disabling saving..."
/usr/local/bin/mcrcon -w 1 "save-off" "save-all flush"
sleep 2 # Make sure it's really saved

# From now on, Minecraft server is not supposed to touch the world direcotry

INCOMPLETE_ARCHIVE_PATH=$(mktemp -p /opt/ezobackup/tmp/ incompleteXXXXXX.tar.gz)

log_print "Creating archive ..."
log_print "Saving incomplete output to $INCOMPLETE_ARCHIVE_PATH"
tar --owner=0 --group=0 --numeric-owner -cf - -C /opt/minecraft/ world/ world_nether/ world_the_end/ | nice -10 pigz -9  > "$INCOMPLETE_ARCHIVE_PATH"

log_print "Re-enabling autosave..."
/usr/local/bin/mcrcon "save-on"

log_print "Moving complete backup to destination..."
mv -fuv "$INCOMPLETE_ARCHIVE_PATH" "/mnt/backup/backups/$FILENAME"

/usr/local/bin/mcrcon "say Biztonsági mentés kész! Fájlnév: $FILENAME"

log_print "Deleting old backups..."
# delete files older than seven days
find /mnt/backup/backups/ -name 'backup_*.tar.gz' -type f -mtime +7 -delete

log_print "Done!"