VPSでMinecraftを立ち上げるためのなんやかんや。どこから拾ったか忘れた。

minecraft.sh

#!/bin/bash
# /etc/init.d/minecraft
# Original: http://minecraft.gamepedia.com/Tutorials/Server_startup_script
# version 0.4.2 2016-02-09 (YYYY-MM-DD)
# Arranged: https://gist.github.com/Sotalbireo/6364b210c4d6f1499d735c1e931a8e6c
# version 0.0.5 2016-10-14 (YYYY-MM-DD)

### BEGIN INIT INFO
# Provides:       minecraft
# Required-Start: $local_fs $remote_fs screen-cleanup
# 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:    Manager of the Minecraft server
# Description:    Manage the minecraft server; start, stop, backup, update, etc.
### END INIT INFO

#Settings
readonly SERVICE='minecraft_server.jar'
readonly SCREENNAME='minecraft_server'
readonly OPTIONS='nogui'
readonly USERNAME='minecraft'
readonly WORLD='world'
readonly MC_DIR='/usr/local/minecraft'
readonly BACKUP_DIR="${MC_DIR}/.backups"
readonly HEAP_MAX=1536 # MB
readonly PERM_MAX=256  # MB
readonly HISTORY=512   # Lines
readonly CPU_COUNT=2   # Core(s)
readonly INVOCATION="java -Xmx${HEAP_MAX}M -Xms${HEAP_MAX}M -XX:PermSize=${PERM_MAX}m -XX:MaxPermSize=${PERM_MAX}m -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalPacing -XX:ParallelGCThreads=$CPU_COUNT -XX:+AggressiveOpts -jar $SERVICE $OPTIONS"
readonly ME=`whoami`

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

mc_start() {
  if  pgrep -u $USERNAME -f $SERVICE >/dev/null ; then
    echo "$SERVICE is already running!"
  else
    echo "Starting $SERVICE..."
    cd $MC_DIR
    as_user "cd $MC_DIR && screen -h $HISTORY -U -dmS $SCREENNAME $INVOCATION"
    sleep 7
    if pgrep -u $USERNAME -f $SERVICE >/dev/null ; then
      echo "$SERVICE is now running."
    else
      echo "Error! Could not start $SERVICE!"
      exit 1
    fi
  fi
}

mc_saveoff() {
  if pgrep -u $USERNAME -f $SERVICE >/dev/null ; then
    echo "$SERVICE is running... suspending saves"
    as_user "screen -p 0 -S $SCREENNAME -X eval 'stuff \"say SERVER BACKUP STARTING. Server going readonly...\"\015'"
    as_user "screen -p 0 -S $SCREENNAME -X eval 'stuff \"save-off\"\015'"
    as_user "screen -p 0 -S $SCREENNAME -X eval 'stuff \"save-all\"\015'"
    sync
    sleep 10
  else
    echo "$SERVICE is not running. Not suspending saves."
  fi
}

mc_saveon() {
  if pgrep -u $USERNAME -f $SERVICE >/dev/null ; then
    echo "$SERVICE is running... re-enabling saves"
    as_user "screen -p 0 -S $SCREENNAME -X eval 'stuff \"save-on\"\015'"
    as_user "screen -p 0 -S $SCREENNAME -X eval 'stuff \"say SERVER BACKUP ENDED. Server going read-write...\"\015'"
  else
    echo "$SERVICE is not running. Not resuming saves."
  fi
}

mc_stop() {
  if pgrep -u $USERNAME -f $SERVICE >/dev/null ; then
    echo "Stopping $SERVICE"
    as_user "screen -p 0 -S $SCREENNAME -X eval 'stuff \"say SERVER SHUTTING DOWN IN 10 SECONDS. Saving map...\"\015'"
    as_user "screen -p 0 -S $SCREENNAME -X eval 'stuff \"save-all\"\015'"
    sleep 10
    as_user "screen -p 0 -S $SCREENNAME -X eval 'stuff \"stop\"\015'"
    sleep 7
  else
    echo "$SERVICE was not running."
  fi
  if pgrep -u $USERNAME -f $SERVICE >/dev/null ; then
    echo "Error! $SERVICE could not be stopped."
  else
    echo "$SERVICE is stopped."
  fi
}

mc_update() {
  if pgrep -u $USERNAME -f $SERVICE >/dev/null ; then
    echo "$SERVICE is running! Will not start update."
  else
    as_user "cd $MC_DIR && wget -q -O $MC_DIR/versions --no-check-certificate https://launchermeta.mojang.com/mc/game/version_manifest.json"
    if [ "$1" == "snapshot" ]; then
      _JSON_VERSION=`cd $MC_DIR && cat versions | python -c "exec(\"import json,sys\nobj=json.load(sys.stdin)\nversion=obj['latest']['snapshot']\nfor v in obj['versions']:\n   if v['id']==version:\n    print(v['url'])\")"`
    else
      _JSON_VERSION=`cd $MC_DIR && cat versions | python -c "exec(\"import json,sys\nobj=json.load(sys.stdin)\nversion=obj['latest']['release']\nfor v in obj['versions']:\n   if v['id']==version:\n    print(v['url'])\")"`
    fi
    as_user "cd $MC_DIR && wget -q -O $MC_DIR/versions --no-check-certificate ${_JSON_VERSION}"
    _MC_SERVER_URL=`cd $MC_DIR && cat versions | python -c 'import json,sys;obj=json.load(sys.stdin);print(obj["downloads"]["server"]["url"])'`
    as_user "rm $MC_DIR/versions"
    as_user "cd $MC_DIR && wget -q -O $MC_DIR/minecraft_server.jar.update --no-check-certificate ${_MC_SERVER_URL}"
    if [ -f $MC_DIR/minecraft_server.jar.update ]; then
      if `diff $MC_DIR/$SERVICE $MC_DIR/minecraft_server.jar.update >/dev/null` ; then
        echo "You are already running the latest version of $SERVICE."
        exit 2
      else
        as_user "mv $MC_DIR/minecraft_server.jar.update $MC_DIR/$SERVICE"
        echo "Minecraft successfully updated."
        exit 0
      fi
    else
      echo "Minecraft update could not be downloaded."
      exit 1
    fi
  fi
}

mc_backup() {
  mc_saveoff
  _NOW=`date "+%Y-%m-%d_%Hh%M"`
  _BACKUP_FILE="$BACKUP_DIR/${WORLD}_${_NOW}.tar"

  echo "Backing up minecraft world..."
  as_user "tar -C \"$MC_DIR\" -cf \"${_BACKUP_FILE}\" $WORLD"

  echo "Backing up $SERVICE..."
  as_user "tar -C \"$MC_DIR\" -rf \"${_BACKUP_FILE}\" $SERVICE"

  mc_saveon

  echo "Compressing backup..."
  as_user "gzip -f \"${_BACKUP_FILE}\""

  if [ -f "${_BACKUP_FILE}" ]; then
    echo "Done."
  else
    echo "Error: Backup file is NOT exists."
  fi
}

mc_command() {
  _command="$1"

  if pgrep -u $USERNAME -f $SERVICE >/dev/null; then
    pre_log_len=`wc -l "$MC_DIR/logs/latest.log" | awk '{print $1}'`
    echo "$SERVICE is running... executing command"
    as_user "screen -p 0 -S ${SCREENNAME} -X eval 'stuff \"${_command}\"\015'"
    sleep .2 # assumes that the command will run and print to the log file in less than .1 seconds
    # print output
    tail -n $((`wc -l "$MC_DIR/logs/latest.log" | awk '{print $1}'`-$pre_log_len)) "$MC_DIR/logs/latest.log"
  else
    exit 2
  fi
}

mc_init(){
  echo "Starting to $SERVICE's server setting up..."
  echo "[1/] Check directory: $MC_DIR"
  if [[ -f "${MC_DIR}" ]]; then
    echo "...Done."
  else
    printf "..."
    as_user "mkdir -rfv ${MC_DIR}"
    if [[ -f "${MC_DIR}" ]]; then
      echo "...Done."
    else
      echo "Error! $?"
      echo "Directory(${MC_DIR}) does NOT exists."
      exit 2
    fi
  fi

}

mc_usage() {
  cat <<EOS
Manager of the Minecraft server
Usage: $0 command [options]

List of Commands:

start     Start the Server.
stop      Stop the Server.
update    Update the Server.
backup    Backups to tar file.
status    Check whether running the server.
restart   Restart the Server.
exec      Doing command at inside the server

  update options:

  snapshot    Update with latest SNAPSHOT release.
  latest      Update with latest MAJOR VERSION release.

  exec command's example:

    - exec "list"
        showing joined users list.
    - exec "say Lorem Ipsum"
        tells "Lorem Ipsum" at all users.

EOS
  exit 1
}



#Start-Stop here
case "$1" in
  start)
    mc_start
    ;;
  stop)
    mc_stop
    ;;
  restart)
    mc_stop
    mc_start
    ;;
  update)
    mc_stop
    mc_backup
    mc_update $2
    mc_start
    ;;
  backup)
    mc_backup
    ;;
  status)
    if pgrep -u $USERNAME -f $SERVICE >/dev/null; then
      echo "$SERVICE is running."
    else
      echo "$SERVICE is not running."
    fi
    ;;
  exec)
    if [ $# -gt 1 ]; then
      shift
      mc_command "$*"
    else
      echo "Must specify server command (try 'help'?)"
      exit 1
    fi
    ;;
  init)
    mc_init
    ;;
  *)
    mc_usage
    ;;
esac

exit $?

ひとまず今動かしてる奴をそのまま。これから修正していきます。

これだ。
http://minecraft.gamepedia.com/Tutorials/Server_startup_script