Thin installation was tested on CentOS 7 nad CentOS 8
Prepare system
You will need java:
yum install java-1.8.0-openjdk-headless
Create dedicated user
useradd --system --create-home --user-group \ --home-dir /opt/minecraft --shell /bin/bash minecraft
or shorter
useradd -r -m -U -d /opt/minecraft -s /bin/bash minecraft
Configure firewall
Create new service mincecraft-server file:
cat << EOF > /etc/firewalld/services/minecraft-server.xml <?xml version="1.0" encoding="utf-8"?> <service> <short>Minecraft server</short> <port port="25565" protocol="tcp"/> <port port="25575" protocol="tcp"/> </service> EOF
Then reload to read new service, enable it and reload to apply changes.
firewall-cmd --reload firewall-cmd --add-service=minecraft-server --permanent firewall-cmd --reload
Prepare directories
su - minecraft
mkdir -p ~/{backups,tools}
mkdir server-1.12.2
mkdir server-1.15.2
Download JAR files
I'm preparing two versions: 1.12.2 and 1.15.2:
cd ~/server-1.15.2 wget "https://launcher.mojang.com/v1/objects/bb2b6b1aefcd70dfd1892149ac3a215f6c636b07/server.jar" -O minecraft_server.1.15.2.jar ln -s minecraft_server.1.15.2.jar server.jar echo eula=true > eula.txt cd ~/server-1.12.2 wget https://launcher.mojang.com/mc/game/1.12.2/server/886945bfb2b978778c3a0288fd7fab09d315b25f/server.jar -O minecraft_server-1.12.2.jar ln -s minecraft_server-1.12.2.jar server.jar echo eula=true > eula.txt
Now you have to chose one. In my example 1.12.2:
cd ln -s server-1.12.2 server
later you can remove this link and create it to another version, ie:
cd rm server ln -s server-1.15.2 server
Configure RCON
Not necessary. Run all command as a "root" user.
Install packages
yum group install "Development Tools" yum install kernel-debug
Download and compile
wget https://github.com/Tiiffi/mcrcon/archive/master.zip cd /tmp/ unzip ~/master.zip cd mcrcon-master/ gcc -std=gnu11 -pedantic -Wall -Wextra -O2 -s -o mcrcon mcrcon.c cp ./mcrcon /opt/minecraft/tools/ chown minecraft.minecraft /opt/minecraft/tools/mcrcon
If you want to use RCON you have to adjust /opt/minecraft/server/server.properties file:
enable-rcon=true rcon.password=strong-password
of course change strong-password to some strong password ;-)
Startup script
Create serivce file as root:
cat << EOF > /etc/systemd/system/minecraft.service [Unit] Description=Minecraft Server After=network.target [Service] User=minecraft Nice=1 KillMode=none SuccessExitStatus=0 1 ProtectHome=true ProtectSystem=full PrivateDevices=true NoNewPrivileges=true WorkingDirectory=/opt/minecraft/server ExecStart=/usr/bin/java -Xmx1024M -Xms512M -jar server.jar nogui ExecStop=/opt/minecraft/tools/mcrcon -H 127.0.0.1 -P 25575 -p strong-password stop [Install] WantedBy=multi-user.target EOF
Run
systemctl start minecraft
You can check /opt/minecraft/server/logs/latest.log to see what is happening.
You should see something like this:
[22:09:52] [Server thread/INFO]: Starting minecraft server version 1.12.2 [22:09:52] [Server thread/INFO]: Loading properties [22:09:52] [Server thread/WARN]: server.properties does not exist [22:09:52] [Server thread/INFO]: Generating new properties file [22:09:52] [Server thread/INFO]: Default game type: SURVIVAL [22:09:52] [Server thread/INFO]: Generating keypair [22:09:53] [Server thread/INFO]: Starting Minecraft server on *:25565 [22:09:53] [Server thread/INFO]: Using epoll channel type [22:09:53] [Server thread/INFO]: Preparing level "world" [22:09:54] [Server thread/INFO]: Loaded 488 advancements [22:09:55] [Server thread/INFO]: Preparing start region for level 0 [22:09:56] [Server thread/INFO]: Preparing spawn area: 5% [22:09:57] [Server thread/INFO]: Preparing spawn area: 8% [22:09:58] [Server thread/INFO]: Preparing spawn area: 13% [22:09:59] [Server thread/INFO]: Preparing spawn area: 17% [22:10:00] [Server thread/INFO]: Preparing spawn area: 22% [22:10:01] [Server thread/INFO]: Preparing spawn area: 28% [22:10:02] [Server thread/INFO]: Preparing spawn area: 32% [22:10:03] [Server thread/INFO]: Preparing spawn area: 37% [22:10:04] [Server thread/INFO]: Preparing spawn area: 42% [22:10:05] [Server thread/INFO]: Preparing spawn area: 48% [22:10:06] [Server thread/INFO]: Preparing spawn area: 53% [22:10:07] [Server thread/INFO]: Preparing spawn area: 59% [22:10:08] [Server thread/INFO]: Preparing spawn area: 65% [22:10:09] [Server thread/INFO]: Preparing spawn area: 70% [22:10:11] [Server thread/INFO]: Preparing spawn area: 75% [22:10:12] [Server thread/INFO]: Preparing spawn area: 80% [22:10:13] [Server thread/INFO]: Preparing spawn area: 86% [22:10:14] [Server thread/INFO]: Preparing spawn area: 90% [22:10:15] [Server thread/INFO]: Preparing spawn area: 96% [22:10:15] [Server thread/INFO]: Done (22.459s)! For help, type "help" or "?"
As you can see first start took more than 22s (not to bad - it's Core 2 Duo and iSCSI disk on 1GB network card - CentOS 8 version of Diskless computer using PXE and iSCSI)
Configure autostart
If you want to start Minecraf server automatically when system starts, just enable this service:
systemctl enable minecraft
That's all.
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