MC Start Script

#!/bin/bash
# /etc/init.d/minecraft
# version 0.3.2 2011-01-27 (YYYY-MM-DD)
### BEGIN INIT INFO
# Provides: minecraft
# Required-Start: $local_fs $remote_fs
# Required-Stop: $local_fs $remote_fs
# Should-Start: $network
# Should-Stop: $network
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: Minecraft server
# Description: Starts the minecraft server
### END INIT INFO
# Settings start
USERNAME="<username>"
JMXPORT=<jmx port>
SERVICE='forge_latest.zip'
MCPATH="/home/$USERNAME/minecraft"
BACKUPPATH="/home/$USERNAME/backup"
CHECKSERVER="/home/$USERNAME/CheckServer"
JMXPWFILE="<path to jmx password file>"
CRASHLOG_DB_PATH='<path to dump crash logs>'
JAVA_HOME="/usr/local/lib/jrockit"
MEMORY_OPTS="-Xmx8G -Xms8G"
JAVA_OPTIONS="-XX:FlightRecorderOptions=defaultrecording=true,disk=true,repository=/home/$USERNAME/jfr/,maxage=30m,settings=profile"
JMX_OPTIONS="-Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.port=$JMXPORT -Dcom.sun.management.jmxremote.password.file=$JMXPWFILE"
INVOCATION="${JAVA_HOME}/bin/java ${MEMORY_OPTS} ${JAVA_OPTIONS} ${JMX_OPTIONS} -jar $SERVICE nogui"
BACKUPARCHIVEPATH=$BACKUPPATH/archive
BACKUPDIR=$(date +%b_%Y)
PORT=$(grep server-port $MCPATH/server.properties | cut -d '=' -f 2)
if [ -z "$PORT" ]; then
PORT=25565
fi
# Settings end
if [ $(whoami) != $USERNAME ]; then
su $USERNAME -l -c "$(readlink -f $0) $*"
exit $?
fi
is_running() {
if [ ! -e $MCPATH/java.pid ]; then
return 1
fi
pid=$(cat $MCPATH/java.pid)
if [ -z $pid ]; then
return 1
fi
ps -eo "%p" | grep "^\\s*$pid\\s*\$" > /dev/null
return $?
}
mc_start() {
if is_running; then
echo "Tried to start but $SERVICE was already running!"
else
echo "$SERVICE was not running... starting."
cd $MCPATH
screen -dmS mc$PORT $INVOCATION &
for (( i=0; i < 10; i++ )); do
screenpid=$(ps -eo '%p %a' | grep -v grep | grep -i screen | grep mc$PORT | awk '{print $1}')
javapid=$(ps -eo '%P %p' | grep "^\\s*$screenpid " | awk '{print $2}')
if [[ -n "$screenpid" && -n "$javapid" ]]; then
break
fi
sleep 1
done
if [[ -n "$screenpid" && -n "$javapid" ]]; then
echo "$SERVICE is now running."
echo "$javapid" > $MCPATH/java.pid
echo "$screenpid.mc$PORT" > $MCPATH/screen.name
else
echo "Could not start $SERVICE."
fi
fi
}
mc_startmonitor() {
if [ -z $CHECKSERVER ]; then
echo "started monitor"
/usr/bin/daemon --name=minecraft_checkserver -- $JAVA_HOME/bin/java -cp $CHECKSERVER CheckServer localhost $PORT
fi
}
mc_saveoff() {
if is_running; then
echo "$SERVICE is running... suspending saves"
mc_exec "say SERVER BACKUP STARTING. Server going readonly..."
mc_exec "save-off"
mc_exec "save-all"
sync
sleep 10
else
echo "$SERVICE was not running. Not suspending saves."
fi
}
mc_saveon() {
if is_running; then
echo "$SERVICE is running... re-enabling saves"
mc_exec "save-on"
mc_exec "say SERVER BACKUP ENDED. Server going read-write..."
else
echo "$SERVICE was not running. Not resuming saves."
fi
}
mc_kill() {
pid=$(cat $MCPATH/java.pid)
echo "terminating process with pid $pid"
kill $pid
for (( i=0; i < 10; i++ )); do
is_running || break
sleep 1
done
if is_running; then
echo "$SERVICE could not be terminated, killing..."
kill -SIGKILL $pid
echo "$SERVICE killed"
else
echo "$SERVICE terminated"
fi
}
mc_stop() {
if is_running; then
echo "$SERVICE is running... stopping."
mc_exec "say SERVER SHUTTING DOWN IN 10 SECONDS. Saving map..."
mc_exec "save-all"
sleep 10
mc_exec "stop"
for (( i=0; i < 20; i++ )); do
is_running || break
sleep 1
done
else
echo "$SERVICE was not running."
fi
if is_running; then
echo "$SERVICE could not be shut down cleanly... still running."
mc_kill
else
echo "$SERVICE is shut down."
fi
rm $MCPATH/java.pid
rm $MCPATH/screen.name
}
mc_stopmonitor() {
if [ -z $CHECKSERVER ]; then
/usr/bin/daemon --name=minecraft_checkserver --stop
fi
}
mc_backup() {
echo "Backing up minecraft world"
[ -d "$BACKUPPATH/$BACKUPDIR" ] || mkdir -p "$BACKUPPATH/$BACKUPDIR"
rdiff-backup $MCPATH "$BACKUPPATH/$BACKUPDIR"
echo "Backup complete"
}
mc_thinoutbackup() {
if (($(date +%H) == 0)) && (($(date +%M) < 15)); then
archivedate=$(date --date="7 days ago")
echo "Thinning backups created $archivedate out"
archivedateunix=$(date --date="$archivedate" +%s)
archivesourcedir=$BACKUPPATH/$(date --date="$archivedate" +%b_%Y)
archivesource=$archivesourcedir/rdiff-backup-data/increments.$(date --date="$archivedate" +%Y-%m-%dT%H):0*.dir
archivesource=$(echo $archivesource)
archivedest=$BACKUPARCHIVEPATH/$(date --date="$archivedate" +%b_%Y)
if [[ ! -f $archivesource ]]; then
echo "Nothing to be done"
else
tempdir=$(mktemp -d)
if [[ ! $tempdir =~ ^/tmp ]]; then
echo "invalid tmp dir $tempdir"
else
rdiff-backup $archivesource $tempdir
rdiff-backup --current-time $archivedateunix $tempdir $archivedest
rm -R "$tempdir"
rdiff-backup --remove-older-than 7D --force $archivesourcedir
echo "done"
fi
fi
fi
}
mc_exec() {
if is_running; then
screen -p 0 -S $(cat $MCPATH/screen.name) -X stuff "$@$(printf \\r)"
else
echo "$SERVICE was not running. Not executing command."
fi
}
mc_dumpcrashlogs() {
if is_running; then
cp $MCPATH/crash-reports/* $CRASHLOG_DB_PATH
mv $MCPATH/crash-reports/* $MCPATH/crash-reports.archive/
fi
}
#Start-Stop here
case "$1" in
start)
if mc_start
then
mc_startmonitor
fi
;;
stop)
mc_stopmonitor
mc_stop
;;
restart)
mc_stop
mc_start
;;
backup)
mc_saveoff
mc_backup
mc_saveon
mc_thinoutbackup
;;
exec)
shift
mc_exec "$@"
;;
dumpcrashlogs)
mc_dumpcrashlogs
;;
status)
if is_running
then
echo "$SERVICE is running."
else
echo "$SERVICE is not running."
fi
;;
*)
echo "Usage: $(readlink -f $0) {start|stop|restart|backup|exec|dumpcrashlogs|status}"
exit 1
;;
esac
exit 0