Little tutorial how to run CB on linux server with automatic backup / restart

Hello All,

I'm not sure how many same tutorials are here already but maybe I will add something new ( or not )

Purpose:

To run CB on linux server ( I use ubuntu ) in screen mode so you can log off and it will go on.
To have full backup of your map every day. ( this save me a lot .. )
To have automatic restart daily for stability purpose.

Setting of CB will not be covered as this can be easily find here around..

Note*
my directory where bukkit binary is, is: /var/minecraft/bukkit/

I use two start scripts.

1: bukkit_start.sh <--- This one start the nogui

Code:

#!/bin/sh
java  -Xincgc -Xmx4G -jar craftbukkit-0.0.1-SNAPSHOT.jar nogui

2: start.sh <--- this one take care of running it in screen

Code:

#!/bin/bash
screen -S minecraft -t world -d -m /var/minecraft/bukkit/bukkit_start.sh

Parameters for screen are important we use them to pass commands to game console with script..

My backup script:
backup.sh

Code:

#!/bin/bash
# Minecraft AutoBackup
NOW=$(date +"%d-%m-%Y")
i=$(date +"%Hh%Mm%Ss")
cd /var/minecraft/bukkit/
if [ -e server.log.lck ] #check if server is running
then #Inform players that backup started
   screen -S minecraft -p world -X stuff "say ###Auto Backup - Started###"`echo -ne '\015'`
   screen -S minecraft -p world -X stuff "save-off"`echo -ne '\015'`
   screen -S minecraft -p world -X stuff "save-all"`echo -ne '\015'`
   sleep 5
   tar -czf /var/minecraft/bukkit/backup/Svet_MineCraftu-$NOW-$i.tar.gz /var/minecraft/bukkit/Svet_MineCraftu  #/var/minecraft/bukkit/backup/ is where is my backup located and Svet_MineCraftu is name of map
   screen -S minecraft -p world -X stuff "save-on"`echo -ne '\015'`
   screen -S minecraft -p world -X stuff "say ###Auto Backup - Done###"`echo -ne '\015'`
   find /var/minecraft/bukkit/backup/ -mmin +2880 -exec rm {} \; #remove backups older than 2days
fi

Restart script
restart.sh <-- will restart server with 1min info in advance for players

Code:

#!/bin/bash
# Minecraft AutoRestart

cd /var/minecraft/bukkit/
screen -S minecraft -p world -X stuff "say ###Auto Restart - Starting###"`echo -ne '\015'`
screen -S minecraft -p world -X stuff "say # Restart in 1 Minute!"`echo -ne '\015'`
sleep 50
screen -S minecraft -p world -X stuff "say # Restart in 10 Seconds!"`echo -ne '\015'`
sleep 5
screen -S minecraft -p world -X stuff "say # Restart in 5 Seconds! You should log off!"`echo -ne '\015'`
screen -S minecraft -p world -X stuff "save-all"`echo -ne '\015'`
sleep 5
screen -S minecraft -p world -X stuff "stop"`echo -ne '\015'`
sleep 5
screen -S minecraft -t world -d -m /var/minecraft/bukkit/bukkit_start.sh
sleep 5
screen -S minecraft -X stuff "say ###Auto Restart - Done###"`echo -ne '\015'`

Check script if server is running or not ( do not detect hanged server )
check.sh

Code:

#!/bin/sh
cd /var/minecraft/bukkit/
if [ -e server.log.lck ]
then
   echo "Server is running !"
else
   echo "Server is down !"
   screen -S minecraft -t world -d -m /var/minecraft/bukkit/bukkit_start.sh
   NOW=$(date +"%b-%d-%y %H:%M")
   echo '[' $NOW ']: Server was down.... Started !' >> /var/minecraft/bukkit/logs/ServerCheck.log
fi

And how it is tight up all together in cron ?

Cron:

Code:

## minecraft maintanance scripts
#This backs up the server at 3:35am every morning.
35  3   *   *   *   cd /var/minecraft/bukkit && ./backup.sh >/dev/null 2>&1
#This restarts the server at 3:40am every morning.
40   3   *   *   *   cd /var/minecraft/bukkit && ./restart.sh >/dev/null 2>&1
#Check if server is running every 30min and if not, will start it
*/30   *   *   *   * cd /var/minecraft/bukkit && ./check.sh >/dev/null 2>&1

Maybe it can be helpful to somebody...

 

Takys mohl ty restart hlasky napsat anglicky

ENG: You could rewrite those restart messages into english.

 

Ah thanks missed that one

 

This was helpful, thanks

 

Thanks for the post! Showing how to use the screen command to post stuff from a script was really helpful. I tried to find information on what "stuff" did, but you can imagine how many useful things you could find googling for "stuff"

 

Yea its kind of misterious parameter... but who care it works

If you like this part, there is new one here http://vladoportos.sk/scripting/minecraft-in-ramdisk-or-how-to-speed-up-minecraft-server-bukkit/ about running minecraft in RAM, it helped my server a lot, there are also script to backup your map to disk if power fails etc... I havent had problem with bukkit since ( except damn grifers )

 

thank you!

This was really helpful for my backup script