Host a Minecraft - Java Edition (Fabric) Dedicated Server

# Update system and install Docker
sudo apt update && sudo apt install -y docker.io
sudo systemctl enable --now docker

# Create game server directory
sudo mkdir -p /opt/gameserver

# Server configuration
export GAMEMODE="survival"
export DIFFICULTY="easy"
export LEVEL_NAME="world"
export PVP="true"
export SPAWN_MONSTERS="true"
export WHITE_LIST="false"
export ALLOW_FLIGHT="true"
export SPAWN_PROTECTION="16"
export HARDCORE="false"
export FORCE_GAMEMODE="false"
export ALLOW_NETHER="true"
export LEVEL_TYPE="minecraft:normal"
export GENERATE_STRUCTURES="true"
export ONLINE_MODE="true"
export ENFORCE_WHITELIST="false"
export ENFORCE_SECURE_PROFILE="true"
export ENABLE_RCON="false"
export ENABLE_QUERY="true"
export ENABLE_STATUS="true"
export ENABLE_COMMAND_BLOCK="false"
export VIEW_DISTANCE="10"
export SIMULATION_DISTANCE="10"
export MAX_TICK_TIME="60000"
export NETWORK_COMPRESSION_THRESHOLD="256"
export VOICE_CHAT_ENABLED="true"
export VOICE_MAX_DISTANCE="48"
export VOICE_WHISPER_DISTANCE="24"
export VOICE_ENABLE_GROUPS="true"

# Pull the container image
docker pull eclipse-temurin:21-jre-alpine

#!/bin/bash

apt update
apt install -y wget curl jq

cd /opt/gameserver || { echo "Failed to change directory to /opt/gameserver"; exit 1; }

# Accept EULA
echo "Accepting EULA..."
echo "eula=true" > eula.txt

# Resolve Minecraft version
MC_VERSION="${MINECRAFT_VERSION:-latest}"
FABRIC_META="https://meta.fabricmc.net/v2"

if [ "$MC_VERSION" = "latest" ]; then
  echo "Fetching latest stable Minecraft version for Fabric..."
  MC_VERSION=$(curl -sSL "$FABRIC_META/versions/game" | jq -r '[.[] | select(.stable==true)][0].version')
  echo "Latest stable version: $MC_VERSION"
elif [ "$MC_VERSION" = "snapshot" ]; then
  echo "Fetching latest snapshot version for Fabric..."
  MC_VERSION=$(curl -sSL "$FABRIC_META/versions/game" | jq -r '[.[] | select(.stable==false)][0].version')
  echo "Latest snapshot version: $MC_VERSION"
else
  echo "Using specified version: $MC_VERSION"
fi

# Get latest stable Fabric loader version
echo "Fetching latest Fabric loader version..."
LOADER_VERSION=$(curl -sSL "$FABRIC_META/versions/loader" | jq -r '[.[] | select(.stable==true)][0].version')
echo "Using Fabric loader: $LOADER_VERSION"

# Get latest Fabric installer version
echo "Fetching latest Fabric installer version..."
INSTALLER_VERSION=$(curl -sSL "$FABRIC_META/versions/installer" | jq -r '.[0].version')
echo "Using Fabric installer: $INSTALLER_VERSION"

# Download and run Fabric installer
echo "Downloading Fabric installer $INSTALLER_VERSION..."
wget -q "https://maven.fabricmc.net/net/fabricmc/fabric-installer/$INSTALLER_VERSION/fabric-installer-$INSTALLER_VERSION.jar" -O fabric-installer.jar

echo "Running Fabric installer for MC $MC_VERSION with loader $LOADER_VERSION..."
java -jar fabric-installer.jar server -mcversion $MC_VERSION -loader $LOADER_VERSION -downloadMinecraft

# Rename JARs to match standard naming
mv server.jar minecraft-server.jar 2>/dev/null || true
mv fabric-server-launch.jar server.jar
echo "serverJar=minecraft-server.jar" > fabric-server-launcher.properties

# Cleanup installer
rm -f fabric-installer.jar

echo "Fabric server installed successfully."

# Install Simple Voice Chat mod if enabled
VOICE_ENABLED="${VOICE_CHAT_ENABLED:-false}"
if [ "$VOICE_ENABLED" = "true" ] || [ "$VOICE_ENABLED" = "1" ]; then
  echo "Voice Chat enabled. Installing Simple Voice Chat mod..."
  mkdir -p mods

  MODRINTH_API="https://api.modrinth.com/v2/project/simple-voice-chat/version?loaders=%5B%22fabric%22%5D&game_versions=%5B%22$MC_VERSION%22%5D"
  VOICE_URL=$(curl -sSL "$MODRINTH_API" | jq -r '.[0].files[0].url // empty')

  if [ -z "$VOICE_URL" ]; then
    echo "No exact version match, trying latest Fabric build..."
    MODRINTH_API="https://api.modrinth.com/v2/project/simple-voice-chat/version?loaders=%5B%22fabric%22%5D"
    VOICE_URL=$(curl -sSL "$MODRINTH_API" | jq -r '.[0].files[0].url // empty')
  fi

  if [ -n "$VOICE_URL" ]; then
    wget -q "$VOICE_URL" -O mods/voicechat.jar
    echo "Simple Voice Chat mod installed."
  else
    echo "WARNING: Could not find Simple Voice Chat for Fabric. Skipping."
  fi
else
  echo "Voice Chat disabled. Skipping mod install."
fi

echo "Install Completed"

sudo ufw allow 25565/tcp
sudo ufw allow 25575/tcp
sudo ufw allow 25566/both
sudo ufw allow 24454/udp