Red Hat startup script for Minecraft

mc-watcher.pl

#!/usr/bin/perl

use strict;

my $date = localtime(time);
my $log_file = "/home/mc/tekkit/server.log";
my $re = '^\d\d\d\d-\d\d-\d\d \d\d:\d\d:\d\d \[SEVERE\] The server has stopped responding.*?';

print "[$date] Watching $log_file\n";
print "[$date] RE: $re\n";
open (TAIL, "tail -F $log_file|");
while (<TAIL>) {
  if (/$re/) {
    print "[$date] Server stopped responding\n";
    system ("/home/mc/tekkit/rc-scripts/minecraft msg \"The server has stopped responding! Restarting...\"");
    system ("/home/mc/tekkit/rc-scripts/minecraft restart");
  }
}
close TAIL;

minecraft

#!/bin/bash
#
# $Id: minecraft,v 1.9 2011/10/04 04:29:02 cnaude Exp $
#
# /etc/rc.d/minecraft

# PROVIDE: minecraft
# REQUIRE: LOGIN

#Settings
SERVICE='Tekkit.jar'
USERNAME='mc'
MCPATH='/games/tekkit'
RUNFILE="${MCPATH}/minecraft.run"
INVOCATION="sh minecraft.sh"
BACKUPDIR=/backups/tekkit
SVRMSG=$2

ME=`whoami`
as_user() {
  if [ $ME == $USERNAME ] ; then
    bash -c "$1"
  else
    su - $USERNAME -c "$1"
  fi
}

mc_start() {
  if ps awwx | grep -v grep | grep -v -i SCREEN | grep $SERVICE > /dev/null
  then
    echo "$SERVICE is already running!"
  else
    screen -wipe tekkit
    echo "Starting $SERVICE..."
    cd $MCPATH
    as_user "cd $MCPATH && screen -dmS tekkit $INVOCATION"
    sleep 7
    if ps awwx | grep -v grep | grep -v -i SCREEN | grep $SERVICE > /dev/null
    then
      echo "$SERVICE is now running."
    else
      echo "Error! Could not start $SERVICE!"
    fi
  fi
}

mc_msg() {
  if ps awwx | grep -v grep | grep -v -i SCREEN | grep $SERVICE > /dev/null
  then
    if [ "x$SVRMSG" != "x" ]; then 
      as_user "screen -p 0 -S tekkit -X eval 'stuff \"say ${SVRMSG}\"\015'"
    else 
      echo "Usage: $0 msg \"Server message\""
    fi
  else
    echo "Minecraft server is not running..."
  fi
}

mc_stop() {
  if [ -e $RUNFILE ]
  then
    echo "Removing $RUNFILE"
    rm $RUNFILE
  fi
  if ps awwx | grep -v grep | grep -v -i SCREEN | grep $SERVICE > /dev/null
  then
    echo "Stopping $SERVICE"
    as_user "screen -p 0 -S tekkit -X eval 'stuff \"say SERVER SHUTTING DOWN IN 10 SECONDS. Saving map...\"\015'"
    as_user "screen -p 0 -S tekkit -X eval 'stuff \"save-all\"\015'"
    sleep 10
    as_user "screen -p 0 -S tekkit -X eval 'stuff \"stop\"\015'"
    sleep 7
  else
    echo "$SERVICE was not running."
  fi
  if ps awwx | grep -v grep | grep -v -i SCREEN | grep $SERVICE > /dev/null
  then
    echo "Error! $SERVICE could not be stopped."
  else
    echo "$SERVICE is stopped."
  fi
}

mc_restart() {
  if ps awwx | grep -v grep | grep -v -i SCREEN | grep $SERVICE > /dev/null
  then
    echo "Restarting $SERVICE"
    as_user "screen -p 0 -S tekkit -X eval 'stuff \"say SERVER RESTARTING IN 10 SECONDS. Saving map...\"\015'"
    mc_save
    sleep 10
    as_user "screen -p 0 -S tekkit -X eval 'stuff \"stop\"\015'"
    sleep 7
  else
    echo "$SERVICE was not running. Starting it up."
    mc_start
  fi
}

mc_save() {
  if ps awwx | grep -v grep | grep -v -i SCREEN | grep $SERVICE > /dev/null
  then
    echo "Sending save-all command to $SERVICE"
    as_user "screen -p 0 -S tekkit -X eval 'stuff \"save-all\"\015'"
  else
    echo "$SERVICE is not running."
  fi
}

mc_backup() {
  BU="world-`date +%Y%m%d.%H%M%S`.tar.gz"
  if ps awwx | grep -v grep | grep -v -i SCREEN | grep $SERVICE > /dev/null
  then
    echo "Sending save-off command to $SERVICE"
    as_user "screen -p 0 -S tekkit -X eval 'stuff \"save-off\"\015'"
    echo "Sending save-all command to $SERVICE"
    as_user "screen -p 0 -S tekkit -X eval 'stuff \"save-all\"\015'"
    echo "Waiting 5 seconds before attempting tar"
    sleep 5
    cd $MCPATH
    echo "Creating $BU"
    tar czvf $BACKUPDIR/$BU world
    echo "Sending save-on command to $SERVICE"
    as_user "screen -p 0 -S tekkit -X eval 'stuff \"save-on\"\015'"
  else
    echo "$SERVICE is not running."
  fi
}

#Start-Stop here
case "$1" in
  start)
    mc_start
    ;;
  stop)
    mc_stop
    ;;
  save)
    mc_save
    ;;
  backup)
    mc_backup
    ;;
  restart)
    mc_restart
    ;;
  msg)
    mc_msg
    ;;
  status)
    if ps awwx | grep -v grep | grep -v -i SCREEN | grep $SERVICE > /dev/null
    then
      echo "$SERVICE is running."
    else
      echo "$SERVICE is not running."
    fi
    ;;
  *)
  echo "Usage: /etc/rc.d/minecraft {start|stop|status|restart|save|backup|msg}"
  exit 1
  ;;
esac

exit 0

minecraft.sh

#!/bin/sh

export HEAPSIZE=10G
export JAVA_HOME=/usr/java/latest
export JAVA=$JAVA_HOME/bin/java
export PATH=$PATH:$JAVA_HOME/bin
export JARFILE="Tekkit.jar"
export LARGEPAGES="-XX:+UseLargePages -XX:LargePageSizeInBytes=2m"

touch minecraft.run

BINDIR="$(dirname "$(readlink -fn "$0")")"
cd "$BINDIR"
while [ -e minecraft.run ]
do
  echo "[`date`] Starting Minecraft" | tee -a mc-startup.log
  #$JAVA -server ${LARGEPAGES} ${GCOPT} -jar ${JARFILE} n
  $JAVA ${LARGEPAGES} -d64 -XX:+UseCompressedOops -server -XX:+UseAdaptiveGCBoundary \
        ${LARGEPAGES} \
        -Xmx${HEAPSIZE} -Xms${HEAPSIZE} \
        -XX:TargetSurvivorRatio=90 \
        -XX:SurvivorRatio=1 \
        -XX:CompileThreshold=300 \
        -XX:+UseConcMarkSweepGC -XX:+UseParNewGC \
        -XX:CMSInitiatingOccupancyFraction=80 \
        -XX:SoftRefLRUPolicyMSPerMB=0 \
        -XX:+UseParNewGC \
        -XX:MaxHeapFreeRatio=25 \
        -XX:MinHeapFreeRatio=21 \
        -XX:+DisableExplicitGC \
        -XX:MaxTenuringThreshold=4 \
        -jar ${JARFILE} nogui

  echo ""
  echo "Press control-c within 5 seconds to exit."
  sleep 5
done