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Lavalink Server Setup Guide

This README guide provides a comprehensive tutorial on what Lavalink is, how to set up your own Lavalink server, and how to keep it running 24/7 from different environments such as your PC, VPS, and even your phone using Termux.

What is a Lavalink Server?

Lavalink is a high-performance audio streaming server that is primarily used by Discord bots for managing audio playback. It offloads audio decoding and streaming from your bot to a separate server, providing enhanced performance, scalability, and reliability for music bots.

Lavalink is based on the Lavaplayer library, which enables efficient audio streaming from sources such as YouTube, SoundCloud, and more. It communicates with your Discord bot through a specific protocol (using WebSocket or HTTP), enabling it to stream audio without putting excessive load on the bot itself.

Key Features:

  • High-performance streaming with low latency.
  • Supports a variety of audio formats (MP3, OGG, etc.).
  • Can stream audio from platforms like YouTube and SoundCloud.
  • Offloads audio processing from your Discord bot, reducing resource consumption.

How to Create Your Own Lavalink Server

Prerequisites:

  1. Java 11 or higher.
  2. Git (if you wish to clone the Lavalink repository).
  3. Redis (optional, for caching).

Step 1: Install Java

Lavalink is built with Java, so you need to have Java 11 or later installed on your system.

For Linux (Ubuntu/Debian):

sudo apt update
sudo apt install openjdk-11-jdk

For Windows or macOS, download Java from the AdoptOpenJDK website and install it.

Step 2: Clone the Lavalink Repository

To get the Lavalink server, you can either clone it directly from GitHub or download the precompiled Lavalink.jar file.

To clone the repository:

git clone https://github.com/freyacodes/Lavalink.git
cd Lavalink

If you want the precompiled JAR, download it from the releases page.

Step 3: Build Lavalink (Optional)

If you cloned the repository and want to build Lavalink, run the following command:

./mvnw clean install

This will compile the Lavalink server and prepare it for use.

Step 4: Configure Lavalink

Lavalink uses a application.yml file for configuration. Edit this file to set up your Lavalink server:

server:
  port: 2333          # Default port for Lavalink
  password: "yoursecretpassword"  # Set a password to connect with your bot
  redis:
    host: localhost    # Optional, for Redis caching (can leave out if not using Redis)
    port: 6379

ytdlOptions:
  youtube_dl:
    max-downloads: 5   # Max YouTube downloads (optional)

Make sure to replace "yoursecretpassword" with a strong password.

Step 5: Start Lavalink Server

Now, start the Lavalink server by running the following command:

java -jar Lavalink.jar

The server should now be running on port 2333 (or the port you configured).

How to Keep Your Lavalink Server Online 24/7

You can keep your Lavalink server running 24/7 from PC, VPS, and even from your phone using Termux.

1. Keep Lavalink Running on a PC

If you are running Lavalink from your PC, use tools like screen or tmux to keep it running even if the terminal is closed.

Option 1: Using screen

  1. Install screen (if not already installed):

    sudo apt install screen

  2. Start a new screen session:

    screen -S lavalink

  3. Run the Lavalink server:

    java -jar Lavalink.jar

  4. Detach from the screen session (without stopping the server): Press Ctrl + A, then press D.

  5. To reattach to the session:

    screen -r lavalink

Option 2: Using tmux

  1. Install tmux:

    sudo apt install tmux

  2. Start a new tmux session:

    tmux new -s lavalink

  3. Run Lavalink:

    java -jar Lavalink.jar

  4. Detach from the session: Press Ctrl + B, then press D.

  5. To reattach to the tmux session:

    tmux attach -t lavalink

2. Keep Lavalink Running on a VPS

To keep Lavalink running 24/7 on a VPS, you can use systemd, which will automatically restart Lavalink if it crashes and ensure it starts on reboot.

Steps to Set Up Lavalink as a systemd Service:

  1. Create a lavalink.service file in /etc/systemd/system/:

    sudo nano /etc/systemd/system/lavalink.service

  2. Add the following content:

    [Unit]
Description=Lavalink Server
After=network.target

[Service]
User=your_username
WorkingDirectory=/path/to/lavalink
ExecStart=/usr/bin/java -jar /path/to/Lavalink.jar
Restart=always
RestartSec=10
LimitNOFILE=4096

[Install]
WantedBy=multi-user.target

  3. Reload the systemd configuration:

    sudo systemctl daemon-reload

  4. Start the Lavalink service:

    sudo systemctl start lavalink

  5. Enable Lavalink to start on boot:

    sudo systemctl enable lavalink

  6. Check the status of Lavalink:

    sudo systemctl status lavalink

3. Keep Lavalink Running Using Termux (On Android)

You can also run Lavalink 24/7 on your Android phone using Termux, which provides a Linux-like environment.

Steps to Set Up Lavalink on Termux:

  1. Install Termux from the Google Play Store or F-Droid.

  2. Open Termux and install required packages:

    pkg update
pkg install openjdk-11
pkg install git

  3. Clone the Lavalink repository or upload the precompiled Lavalink.jar:

    git clone https://github.com/freyacodes/Lavalink.git
cd Lavalink

  4. Run Lavalink in Termux:

    java -jar Lavalink.jar

To keep Lavalink running in the background, use screen or tmux as described above.

Conclusion

By following this guide, you can create your own Lavalink server and run it 24/7 from various environments like your PC, VPS, or even your Android phone using Termux. Whether you want to deploy it on a powerful VPS for scalability or keep it running on a mobile device, this setup ensures continuous availability for your Discord bot to handle audio streaming.

Let your music bot play seamlessly across your Discord servers with Lavalink!