Minecraft Server Upgrade Skript

Skript, welches vom mir erstellt wurde, um automatisiert (via cronjob) einen selbst erstellten Minecraft-Server auf aktuellem Stand zu halten; resp. zu Updaten.

Filename: update_minecraft-server.sh

#!/bin/bash
#*****************************************************************************
# Subject     : update_minecraft-server.sh
# Description :
# Author      : Michael Reber <michael.r467@gmail.com>
# Created     : 2017.10.17
#*****************************************************************************

newest_server_version=$(curl https://minecraft.net/en-us/download/server | grep https://s3.amazonaws.com/Minecraft.Download/versions/.*/minecraft_server.*.jar | cut -d '/' -f6)
in_use_server_version=$(cat /opt/minecraft/logs/latest.log | grep "server version" | cut -d ' ' -f8)

echo $in_use_server_version
echo $newest_server_version

if [ $in_use_server_version == $newest_server_version ]; then
echo "Server is up to date!"
fi

if [ $in_use_server_version != $newest_server_version ]; then
        echo "SERVER NEEDS UPDATE!"
        new_server_download_link=$(curl https://minecraft.net/en-us/download/server | grep https://s3.amazonaws.com/Minecraft.Download/versions/.*/minecraft_server.*.jar | cut -d '"' -f2)

        cd /opt/minecraft
        #Make Backup of Server
        cp minecraft_server.jar minecraft_server.jar-backup
        cp -r world world-backup

        #Stop Minecraft Server
        server_session=$(screen -ls | grep minecraftd  | cut -d '(' -f1)
        #screen -X -S 718.minecraftd quit

        rm -f minecraft_server.jar
        wget -O minecraft_server.jar $new_server_download_link
        chown -R mcuser:mcuser /opt/minecraft
        chmod +x /opt/minecraft/minecraft_server.jar
        /opt/minecraft/./start_server.sh
fi

#!/bin/bash

#-------------------------------------------------------------------------------------------------------------
#
# Subject: minecraft_server_update.sh
# Description   : This Script updates the Minecraft Server to the actual version
# Author: Stefan Gutknecht <stefgu@bluewin.ch>
# Created: 2019.07.25
# Version: v0.1
# Use: You can start this script manually or you can automate it with cron/crontab
# 
# Changelog:
# ---------
#
# v0.1- Creation of this Script
#-------------------------------------------------------------------------------------------------------------

# Define BASH-Color Output

NORMAL='\e[39m'
GREEN='\e[32m'
RED='\e[31m'
CYAN='\e[36m'

# Actual Date Variable - Formatted
datum=$(date +"%Y%m%d")

# Get the PID of the minecraft process
screen_process=$(ps -aux | grep minecraftd | grep -v "grep" | awk 'NR==1{print $2}')

# Define Server Variables for comparing

actual_server_version=$(cat /opt/minecraft/logs/latest.log | grep -e 'server\sversion\s' | cut -d ' ' -f8)
server_version_mojang=$(curl -s https://www.minecraft.net/de-de/download/server | grep -e "minecraft_server." | cut -d '.' -f5-7 | grep -v "jar")

if [ $actual_server_version = $server_version_mojang ]; then
echo -e "$GREEN Aktuell keine neue Server-Version verfuegbar $NORMAL - $CYAN Nothing to do $NORMAL"
fi

if [ $actual_server_version != $server_version_mojang ]; then
echo -e "$RED Update available $NORMAL - $CYAN Will make the necessary Steps ... $NORMAL"

# Kill the minecraft process
kill -9 $screen_process 2>/dev/null
fail_code=$(echo "$?")
if [ $? == 0 ]; then
  echo -e "$GREEN R.I.P - Screen Process$NORMAL"
else
  echo -e "$RED Something went wrong - couldn't kill the process$NORMAL"
  echo "$fail_code"  
exit 0
fi
# Backup the minecraft_server.jar File
echo "Backup Server-Jar-File /opt/minecraft/minecraft_server.jar to $CYAN/opt/minecraft/backup/jar/*$NORMAL"
echo -ne 'x-----x                       (33%)\r'
cp --preserve=mode,ownership /opt/minecraft/minecraft_server.jar /opt/minecraft/backup/jar/minecraft_server.jar.$datum
sleep 0.5
echo -ne 'x----------------x            (66%)\r'
sleep 0.5
echo -ne 'x---------------------------x (100%)\r'
echo -ne '\n'

# Backup the minecraft world directory
echo "Backup the world directory /opt/minecraft/ to $CYAN/opt/minecraft/backup/world/*$NORMAL"
echo -ne 'x-----x                       (33%)\r'
 tar -czf /opt/minecraft/backup/world/world_$datum.tar.gz /opt/minecraft/world/
 sleep 0.5
echo -ne 'x----------------x            (66%)\r'
sleep 0.5
echo -ne 'x---------------------------x (100%)\r'
echo -ne '\n'

# Download the new minecraft_server and set permissions
download_link=$(curl -s https://www.minecraft.net/de-de/download/server | grep -e '<a href=' | grep 'launcher' | cut -d '"' -f2)
echo -e "$CYANGoing to download the new version$NORMAL"
wget -O /opt/minecraft/server.jar $download_link
rm -f /opt/minecraft/minecraft_server.jar
mv /opt/minecraft/server.jar /opt/minecraft/minecraft_server.jar
echo -e "$CYAN Adapting the permissions$NORMAL"
chown mcuser:mcuser /opt/minecraft
chmod +x /opt/minecraft/minecraft_server.jar
rm -f /opt/minecraft/server.jar

# Start the new minecraft server
echo -e "$RED Starting the Minecraft Server$NORMAL"
echo -ne 'x-----x                       (33%)\r'
sudo -u mcuser /opt/minecraft/start_minecraft_server.sh
sleep 0.5
echo -ne 'x----------------x            (66%)\r'
sleep 0.5
echo -ne 'x---------------------------x (100%)\r'
echo -ne '\n'

# Removing old unnecessary Backups - older than 180 days
echo -e "$CYAN Going to remove old Backups$NORMAL"
find /opt/minecraft/backup/ -type f -mtime +180 -exec rm -f {} \;
fi
exit 0