minecraft

#!/sbin/runscript

# User that should run the server
USERNAME="minecraft"

# Server name, used for folder name in locating everything on disk and for world location on ramdisk
SERVERNAME='realm'

# Root where all minecraft servers are stored
MCROOT='/var/lib/minecraft'

#List of MySQL databases to include in backups
DATABASES='commandshops pex'

#Remote console information. Required for proper saving!!
RCONPORT='25575'
RCONPASS='password'
RCONEXEC='/opt/mcrcon'
RCONCALL="${RCONEXEC} -s -H localhost -P ${RCONPORT} -p ${RCONPASS}"

# Path to the main minecraft directory for this particular server
MCBASE="${MCROOT}/${SERVERNAME}"
# Folder containing actual server
MCPATH="${MCBASE}/server"
# Path to server.jar file
SERVICE="${MCPATH}/craftbukkit.jar"
CPU_COUNT=12
# When deciding on ram limit remember to make room for the ramdisk
INVOCATION="java -- -Xmx64G -Xms1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalPacing -XX:ParallelGCThreads=$CPU_COUNT -XX:+AggressiveOpts -jar $SERVICE nogui"
# Where the world backups should go
BACKUPPATH="${MCBASE}/backups"
# Where the logs are copied when running log-roll
LOGPATH="${MCBASE}/logs"
# Where the world is located on the disk
WORLDSTORAGE="${MCPATH}/diskworld"
#Path to the the mounted ramdisk default in ubuntu: /dev/shm
RAMDISKROOT="/dev/shm"
RAMDISKMC="${RAMDISKROOT}/minecraft"
RAMDISK="${RAMDISKMC}/${SERVERNAME}"

ME=`whoami`

depend() {
  use net mysql
}

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

datepath() {
    # datepath path filending-to-check returned-filending
    if [ -e $1`date +%x`$2 ]
    then
        echo $1`date +%FT%T`$3
    else
        echo $1`date +%F`$3
    fi
}

start() {
    ebegin "Starting minecraft server '$SERVERNAME'"
    einfo "Copying world to ram"
    as_user "mkdir $RAMDISKMC"
    as_user "mkdir $RAMDISK"
    chown -R $USERNAME:root $RAMDISK
    as_user "rsync -rtpg $WORLDSTORAGE/ $RAMDISK"
    einfo "World copied to ram. Starting Bukkit"
    cd $MCPATH
    start-stop-daemon --start --name $SERVERNAME --user $USERNAME --background --make-pidfile --pidfile /var/run/$SERVERNAME.pid --exec $INVOCATION
    eend $?
}

stop() {
    ebegin "Stopping minecraft server '$SERVERNAME'"
    $RCONCALL save-all
    $RCONCALL stop
    start-stop-daemon --stop --pidfile /var/run/$SERVERNAME.pid --name $SERVERNAME
    einfo "Copying world to disk"
    as_user "rsync -rt $RAMDISK/* $WORLDSTORAGE"
    eend $?
}

extra_commands="backup todisk logroll"

backup() {
    todisk
        einfo "Backing up FS data"
        path=`datepath $BACKUPPATH/mine_`
        as_user "mkdir $path"
        as_user "cp -r $MCPATH $path/server"
        einfo "Backing up databases"
        as_user "mysqldump --no-create-db --no-create-info --no-tablespaces --databases $DATABASES >$path/databases.sql"
        einfo "Backup done."
        find $BACKUPPATH -maxdepth 1 -type d -mtime +30 -exec rm -r {} \;
    einfo "Old backups pruned."
}

todisk() {
    $RCONCALL save-all
    as_user "rsync -rt $RAMDISK/* $WORLDSTORAGE"
    einfo "Worlds saved to disk."
}

logroll() {
    # Moves and Gzips the logfile, a big log file slows down the
    # server ALOT (what was notch thinking?)
        path=`datepath $LOGPATH/server_ .log.gz .log`
        as_user "cp $MCPATH/server.log $path && gzip $path"
        as_user "truncate $MCPATH/server.log --size 0"
    einfo "Log rotated."
}