So just fooling around and wanted to make an installation script to install a Minecraft dedicated server on Linux. I’ve done a little research so going to try to put together some sort of an application.
Application Structure
Going to start off with the application structure.
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minecraft_installer
├── build.sh
└── dist
├── server.properties
├── other server files
└── server.jar
The main folder is going to contain the nessecary files to build the application, and best practice is to have a script for the package creation seperated in a build.sh file.
Payload
So for the payload we need to create an archive of the preconfigured minecraft server files. So download the minecraft server files first.
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wget https://piston-data.mojang.com/v1/objects/c9df48efed58511cdd0213c56b9013a7b5c9ac1f/server.jar
Then we need to extract the jar files then delete the server.jar
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java -Xmx1024M -Xms1024M -jar server.jar nogui
This will allow us to modify and automate the process of setting up the server. After we have configured everything we can tar for delivery.
User Configuration
It’s time to create a script that will install and configure our ./dist files. We can pretty much modify this script to do anything for us.
We need to setup a script that checks for open ports as well as acceptable folders that will install our configured server files. So lets go.
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install_main ()
{
echo "Configuring server.properties"
#Minecraft server properties
#Thu Jan 12 03:46:57 PST 2023
echo "enable-jmx-monitoring=false" > dist/server.properties
echo "enable-jmx-monitoring=false"
echo "############################################################"
echo "# CHOOSE PORT "
echo "############################################################"
process=$((0))
port_check ()
{
echo "Enter port for the server between 20000-30000 but not default: "
read port_choice
if [[ $port_choice != '^[0-9]+$' ]] && [[ $port_choice -ge 20000 && $port_choice -le 30000 ]]; then
echo "Checking $port_choice."
else
echo "Is not a valid number, or choice is empty."
port_check
fi
if netstat -tuln | grep -q ":$port_choice "; then
echo "Port $port_choice is in use."
port_check
else
echo "Port $port_choice is free."
echo "Port check completed successfully."
process=$(($process + 1))
fi
sleep 0.2
}
# Check port is good
if [[ $process = 0 ]]; then
port_check
fi
echo "rcon.port=$port_choice" >> dist/server.properties
echo "rcon.port=$port_choice"
echo "level-seed=" >> dist/server.properties
echo "level-seed="
echo "gamemode=survival" >> dist/server.properties
echo "gamemode=survival"
echo "enable-command-block=false" >> dist/server.properties
echo "enable-command-block=false"
echo "enable-query=false" >> dist/server.properties
echo "enable-query=false"
echo "generator-settings={}" >> dist/server.properties
echo "generator-settings={}"
echo "enforce-secure-profile=true" >> dist/server.properties
echo "enforce-secure-profile=true"
echo "level-name=world" >> dist/server.properties
echo "level-name=world"
echo "motd=A Minecraft Server" >> dist/server.properties
echo "motd=A Minecraft Server"
echo "query.port=$port_choice" >> dist/server.properties
echo "query.port=$port_choice"
echo "pvp=true" >> dist/server.properties
echo "generate-structures=true" >> dist/server.properties
echo "generate-structures=true"
echo "max-chained-neighbor-updates=1000000" >> dist/server.properties
echo "max-chained-neighbor-updates=1000000"
echo "difficulty=easy" >> dist/server.properties
echo "difficulty=easy"
echo "network-compression-threshold=256" >> dist/server.properties
echo "network-compression-threshold=256"
echo "max-tick-time=60000" >> dist/server.properties
echo "max-tick-time=60000"
echo "require-resource-pack=false" >> dist/server.properties
echo "require-resource-pack=false"
echo "use-native-transport=true" >> dist/server.properties
echo "use-native-transport=true"
echo "max-players=20" >> dist/server.properties
echo "max-players=20"
echo "online-mode=true" >> dist/server.properties
echo "online-mode=true"
echo "enable-status=true" >> dist/server.properties
echo "enable-status=true"
echo "allow-flight=false" >> dist/server.properties
echo "allow-flight=false"
echo "initial-disabled-packs=" >> dist/server.properties
echo "initial-disabled-packs="
echo "broadcast-rcon-to-ops=true" >> dist/server.properties
echo "broadcast-rcon-to-ops=true"
echo "view-distance=10" >> dist/server.properties
echo "view-distance=10"
echo "server-ip=" >> dist/server.properties
echo "server-ip="
echo "resource-pack-prompt=" >> dist/server.properties
echo "resource-pack-prompt="
echo "allow-nether=true" >> dist/server.properties
echo "allow-nether=true"
echo "server-port=$port_choice" >> dist/server.properties
echo "server-port=$port_choice"
echo "enable-rcon=false" >> dist/server.properties
echo "enable-rcon=false"
echo "sync-chunk-writes=true" >> dist/server.properties
echo "sync-chunk-writes=true"
echo "op-permission-level=4" >> dist/server.properties
echo "op-permission-level=4"
echo "prevent-proxy-connections=false" >> dist/server.properties
echo "prevent-proxy-connections=false"
echo "hide-online-players=false" >> dist/server.properties
echo "hide-online-players=false"
echo "resource-pack=" >> dist/server.properties
echo "resource-pack="
echo "entity-broadcast-range-percentage=100" >> dist/server.properties
echo "entity-broadcast-range-percentage=100"
echo "simulation-distance=10" >> dist/server.properties
echo "simulation-distance=10"
echo "rcon.password=" >> dist/server.properties
echo "rcon.password="
echo "player-idle-timeout=0" >> dist/server.properties
echo "player-idle-timeout=0"
echo "force-gamemode=false" >> dist/server.properties
echo "force-gamemode=false"
echo "rate-limit=0" >> dist/server.properties
echo "rate-limit=0"
echo "hardcore=false" >> dist/server.properties
echo "hardcore=false"
echo "white-list=false" >> dist/server.properties
echo "white-list=false"
echo "broadcast-console-to-ops=true" >> dist/server.properties
echo "broadcast-console-to-ops=true"
echo "spawn-npcs=true" >> dist/server.properties
echo "spawn-npcs=true"
echo "spawn-animals=true" >> dist/server.properties
echo "spawn-animals=true"
echo "function-permission-level=2" >> dist/server.properties
echo "function-permission-level=2"
echo "initial-enabled-packs=vanilla" >> dist/server.properties
echo "initial-enabled-packs=vanilla"
echo "level-type=minecraft\:normal" >> dist/server.properties
echo "level-type=minecraft\:normal"
echo "text-filtering-config=" >> dist/server.properties
echo "text-filtering-config="
echo "spawn-monsters=true" >> dist/server.properties
echo "spawn-monsters=true"
echo "enforce-whitelist=false" >> dist/server.properties
echo "enforce-whitelist=false"
echo "spawn-protection=16" >> dist/server.properties
echo "spawn-protection=16"
echo "resource-pack-sha1=" >> dist/server.properties
echo "resource-pack-sha1="
echo "max-world-size=29999984" >> dist/server.properties
echo "max-world-size=29999984"
}
build ()
{
install_agree
install_main
}
build
Folder Check
I was going to make this installation process more abstract, but I am going to try to make a locally hoster webserver and document that where the variables will be completely customizable.
But for now we need to create a process for the program to check for and create a valid directory. Then extract to the directory.
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# server.properties setup completed tar and extract to designated folder
echo "server.properties setup completed."
echo "############################################################"
echo "# CHOOSE FOLDER "
echo "############################################################"
}
install_final ()
{
exists=0
#check folder for installation
user_folder=$(getent passwd $USER | cut -d: -f6)
echo "Enter folder for installation."
echo "This will be located at /tmp$user_folder"
read install_folder
install_dir="${user_folder}/${install_folder}"
echo "$install_dir"
sleep 0.2
# check user folder
if [[ -d /tmp$install_dir ]]; then
if [[ $exists -eq 0 ]]; then
echo "The directory /tmp$install_dir already exists."
echo "Try again."
exists=1
fi
install_final
else
echo "installing at /tmp$install_dir"
# create directory
mkdir -p /tmp$install_dir
echo "Successfully created at /tmp$install_dir"
sleep 0.2
fi
Tar and extract
With our package and installation ready we can use use a simple but powerful command to tar and extract.
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# tar and extract to folder
(cd ./dist && tar cv .) | (cd /tmp/$install_dir && tar xvf -)
echo "COMPLETED"
}
build ()
{
install_agree
install_main
install_final
}
build
Everything together should be a working script. Except it will extract the files to /tmp for testing purposes, which wouldn’t be ideal. Anyways was good practice.
I am going to probably work on making a web frontend to manipulate the server variables which would be cool to test some things I have learned. See if i can make it secure.