minecraft-server-fabric/minecraftd.sh

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#!/bin/bash
source /etc/conf.d/minecraft || echo "Could not source /etc/conf.d/minecraft"
# You may use this script for any minecraft server of your choice, just alter the config file
SERVER_ROOT="${SERVER_ROOT:-/srv/minecraft}"
BACKUPPATH="${BACKUPPATH:-/srv/minecraft/backup}"
LOGPATH="${LOGPATH:-/srv/minecraft/logs}"
WORLDPATHS="${WORLDPATHS:-/srv/minecraft/world}"
KEEP_BACKUPS="${KEEP_BACKUPS:-10}"
MC_USER="${MC_USER:-minecraft}"
MAIN_JAR="${MAIN_JAR:-minecraft_server.jar}"
SESSION_NAME="${SESSION_NAME:-minecraft}"
# Specify system parameters for the minecraft server
MINHEAP="${MINHEAP:-512M}"
MAXHEAP="${MAXHEAP:-1024M}"
THREADS="${THREADS:-1}"
JAVA_PARMS="${JAVA_PARMS:-"-Xmx${MAXHEAP} -Xms${MINHEAP} -XX:ParallelGCThreads=${THREADS}"}"
# Check for sudo rigths
if [ $(sudo whoami) != "root" ]; then
echo "You must have sudo access in order to use this script."
exit 1
fi
# Pipe any given argument to the minecraft server console
mc_command() {
sudo -u ${MC_USER} screen -S ${SESSION_NAME} -X stuff "`printf \"$*\r\"`"
}
# Start the server if it is not already running
server_start() {
sudo -u ${MC_USER} screen -S ${SESSION_NAME} -Q select . > /dev/null
if [ $? -eq 0 ]; then
echo "A screen ${SESSION_NAME} session is already running. Please close it first."
else
echo -en "Starting server... "
sudo -u ${MC_USER} screen -dmS ${SESSION_NAME} /bin/bash -c "cd ${SERVER_ROOT}; java ${JAVA_PARMS} -jar ${SERVER_ROOT}/${MAIN_JAR} nogui"
echo -e "\e[39;1m done\e[0m"
fi
}
# Stop the server gracefully by saving everything prior and warning the users
server_stop() {
sudo -u ${MC_USER} screen -S ${SESSION_NAME} -Q select . > /dev/null
if [ $? -eq 0 ]; then
mc_command save-all
mc_command say "Server is going down in 10 seconds! HURRY UP WITH WATHEVER YOU ARE DOING!" # Warning the users
echo -en "Server is going down in... "
for i in $(seq 1 10);
do
mc_command say "down in... $(expr 10 - $i)"
echo -n " $(expr 10 - $i)"
sleep 1
done
mc_command stop
echo -e "\e[39;1m done\e[0m"
else
echo "The corresponding screen session for ${SESSION_NAME} was already dead."
fi
}
# Print whether the server is running and if so give some information about memory usage and threads
server_status() {
sudo -u ${MC_USER} screen -S ${SESSION_NAME} -Q select . > /dev/null
if [ $? -eq 0 ]; then
echo -e "Status:\e[39;1m running\e[0m"
# Calculating memory usage
for p in $(sudo -u ${MC_USER} pgrep -f ${MAIN_JAR}); do
ps -p$p -O rss | tail -n1;
done | gawk '{ count ++; sum += $2 }; END {count --; print "Number of processes =", count, "(screen, bash,", count-2, "x java)"; print "Total memory usage =", sum/1024, "MB" ;};'
else
echo -e "Status:\e[39;1m stopped\e[0m"
fi
}
# Restart the complete server by shutting it down and starting it again
server_restart() {
sudo -u ${MC_USER} screen -S ${SESSION_NAME} -Q select . > /dev/null
if [ $? -eq 0 ]; then
server_stop
sleep 0.1
server_start
else
server_start
fi
}
# Backup the directories specified in $WORLDPATHS
backup_files() {
which tar &> /dev/null
if [ $? -ne 0 ]; then
echo "The tar binaries are needed for a backup."
exit 2
fi
echo "Starting backup..."
FILE="`date +%Y%m%d%H%M%S`.tar.gz"
sudo -u ${MC_USER} mkdir -p ${BACKUPPATH}
sudo -u ${MC_USER} screen -S ${SESSION_NAME} -Q select . > /dev/null
if [ $? -eq 0 ]; then
mc_command save-off
mc_command save-all
sync && wait
sudo -u ${MC_USER} tar -czf ${BACKUPPATH}/${FILE} --totals ${WORLDPATHS} 2>&1 | grep -v "tar: Removing leading "
mc_command save-on
else
sudo -u ${MC_USER} tar -czf ${BACKUPPATH}/${FILE} --totals ${WORLDPATHS} 2>&1 | grep -v "tar: Removing leading "
fi
echo -e "\e[39;1mbackup completed\e[0m\n"
echo -n "Only keeping the last ${KEEP_BACKUPS} backups and removing the other ones..."
BACKUP_COUNT=$(for f in ${BACKUPPATH}/[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]*; do echo $f; done | wc -l)
if [ $(expr ${BACKUP_COUNT} - ${KEEP_BACKUPS}) -gt 0 ]; then
sudo -u ${MC_USER} rm $(for f in ${BACKUPPATH}/[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]*; do echo $f; done | head -n$(expr ${BACKUP_COUNT} - ${KEEP_BACKUPS}))
echo -e "\e[39;1m done\e[0m ($(expr ${BACKUP_COUNT} - ${KEEP_BACKUPS}) backup(s) pruned)"
else
echo -e "\e[39;1m done\e[0m (no backups pruned)"
fi
}
# Run the given comman at the minecraft server console
server_command() {
if [ $# -lt 1 ]; then
echo "No server command specified. Try 'help' for a list of commands."
exit 1
fi
sudo -u ${MC_USER} screen -S ${SESSION_NAME} -Q select . > /dev/null
if [ $? -eq 0 ]; then
sleep 0.1s &
SLEEP_PID=$!
mc_command "$@" &
tail -f --pid=${SLEEP_PID} -n 0 ${LOGPATH}/latest.log
else
echo "There is no ${SESSION_NAME} session to connect to."
fi
}
# Enter the screen minecraft session
server_console() {
sudo -u ${MC_USER} screen -S ${SESSION_NAME} -Q select . > /dev/null
if [ $? -eq 0 ]; then
sudo -u ${MC_USER} screen -S ${SESSION_NAME} -rx
else
echo "There is no ${SESSION_NAME} session to connect to."
fi
}
# Help function, no arguments required
help() {
cat <<- 'EOF'
This script was design to easily control any minecraft server. Quite every parameter for a given
minecraft server derivative can be altered by editing the variables in the configuration file.
Usage: minecraftd {start|stop|status|backup|command <command>|console}
start Start the minecraft server
stop Stop the minecraft server
restart Restart the minecraft server
status Print some status information
backup Backup the world data
command <command> Run the given comman at the minecraft server console
console Enter the server console through a screen session
Copyright (c) Gordian Edenhofer <gordian.edenhofer@gmail.com>
EOF
}
case "$1" in
start)
server_start
;;
stop)
server_stop
;;
status)
server_status
;;
restart)
server_restart
;;
console)
server_console
;;
command)
server_command "${@:2}"
;;
backup)
backup_files
;;
*|-h|--help)
help
esac
exit 0