ProxMox-GuestSetups/Minecraft

Description

A Minecraft server resource repository for running it on RockyLinux 9.x LXC

Installation

To setup your Minecraft LXC server start out with a fresh RockyLinux 9.x LXC - and will assumes that your server has:

* (atleast) 4Gb of memory available.
* Default minecraft port 25565 (TCP/UDP) open in firewall
* SSH acccess to the box.

Install required packages: (some packages like zstd are work in progress for changing backup to use them in the future)

dnf install wget tmux tar zstd java-21-openjdk -y

Create folderstructure for Minecraft.

mkdir -p /opt/minecraft/backups/{hourly,daily,weekly,monthly}

Create minecraft user.

useradd -r -m -U -d /opt/minecraft -s /bin/bash minecraft

Set ownership to minecraft user on created directory-structure.

chown -R minecraft.minecraft /opt/minecraft

Change user to minecraft.

su - minecraft

As minecraft user download the server-jar from Minecraft.net When writing this the version was 1.18.1.

wget -O minecraft_server.1.18.1.jar https://launcher.mojang.com/v1/objects/125e5adf40c659fd3bce3e66e67a16bb49ecc1b9/server.jar

Create a symbolic link to the current version of the server-jar you downloaded (this will make it easy to just replace the symbolic link to a new/future version when updating)

ln -s minecraft_server.1.18.1.jar server.jar

Start the minecraft server to create server.properties and eula.txt, it will shutdown again afterwards (ignore errors/warnings on the output).

java -Xmx1024M -Xms512M -jar server.jar nogui

Overwrite the content of the previously created eula.txt so the content reads eula=true.

echo "eula=true" > eula.txt

Place/create either the (in this repository) provided tar backup script or the zst with better compression backup script and make it executable.

wget https://git.comsolve.nl/Comsolve/ProxMox-GuestSetups/raw/master/Minecraft/backup.sh
chmod +x backup.sh

OR

wget https://git.comsolve.nl/Comsolve/ProxMox-GuestSetups/raw/master/Minecraft/backup-zst.sh
chmod +x backup-zst.sh

Install a crontab job to run the backup job each hour (the -s switch specifies to the script to run on a schedule)

echo "0 * * * * /opt/minecraft/backup.sh -s" | crontab -

OR

echo "0 * * * * /opt/minecraft/backup-zst.sh -s" | crontab -

The default backup-script settings are for a hourly/daily/weekly rotation, if you like to change this, then edit the script:

* Find the line in the script `# Increments of time on which to back up`.
* Adapt the parameters to your own needs for HOURLY,DAILY,WEEKLY,MONTHLY by setting true/false.

Switch back to user root by pressing CRTL-D

Place/create the also (in this repository) provided systemd file in /etc/systemd/system/minecraft.service

wget -O /etc/systemd/system/minecraft.service https://git.comsolve.nl/Comsolve/ProxMox-GuestSetups/raw/master/Minecraft/minecraft.service

Reload Systemd daemon.

systemctl daemon-reload

Start your Minecraft server via the systemd service.

systemctl start minecraft

Verify a successfull start of the server.

systemctl status minecraft

The output should look something like this:

● minecraft.service - Minecraft Server
   Loaded: loaded (/etc/systemd/system/minecraft.service; enabled; vendor preset: disabled)
  Drop-In: /run/systemd/system/minecraft.service.d
           └─zzz-lxc-service.conf
   Active: active (running) since Tue 2022-02-08 01:29:58 CET; 6s ago
  Process: 304926 ExecStop=/bin/sleep 2 (code=exited, status=0/SUCCESS)
  Process: 304925 ExecStop=/usr/bin/tmux send-keys -t minecraft:0.0 say SERVER SHUTTING DOWN. Saving map... C-m save-all C-m stop C-m (code
=exited, status=0/SUCCESS)
  Process: 304935 ExecStart=/usr/bin/tmux new -s minecraft -d /usr/bin/java -Xmx3096M -Xms2048M -XX:+UseG1GC -jar server.jar --nogui (code=
exited, status=0/SUCCESS)
 Main PID: 304937 (tmux: server)
    Tasks: 25 (limit: 927876)
   Memory: 330.1M
   CGroup: /system.slice/minecraft.service
           ├─304937 /usr/bin/tmux new -s minecraft -d /usr/bin/java -Xmx3096M -Xms2048M -XX:+UseG1GC -jar server.jar --nogui
           └─304938 /usr/bin/java -Xmx3096M -Xms2048M -XX:+UseG1GC -jar server.jar --nogui

Feb 08 01:29:58 minecraft.myservername.tld systemd[1]: Starting Minecraft Server...
Feb 08 01:29:58 minecraft.myservername.tld systemd[1]: Started Minecraft Server.

When the start was corect enable the minecraft service.

systemctl enable minecraft

Updating

To update the server to a newer version of minecraft perform the follwing procedure:

Stop the minecraft server (when running / as root)

systemctl stop minecraft

Change to the minecraft user.

su minecraft

Download the new minecraft server file ( example , the exact link should be otained from mojang itself).

wget -O minecraft_server.1.19.jar https://launcher.mojang.com/v1/objects/e00c4052dac1d59a1188b2aa9d5a87113aaf1122/server.jar

Update symbolic link to the new version.

ln -sf minecraft_server.1.19.jar server.jar

Exit minecraft user (assuming you logged in originally as root).

exit (or Ctrl+D)

Start minecraft Server.

systemctl start minecraft.service

Enjoy your Minecraft Server !