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How to install a Fabric server on NexusCloud

Fabric is a lightweight mod loader for Minecraft Java Edition. This guide explains how to install a Fabric server in the NexusCloud panel, from downloading the Fabric installer to having the server ready to play.

Preparation

  • Make sure your service is active and the server is stopped before you begin.
  • Decide on the Minecraft version, Fabric Loader version, and Fabric Installer version you want to use. This guide uses these as an example:
    • Minecraft 1.21.4
    • Fabric Loader 0.16.2
    • Fabric Installer 1.0.2
  • The minimum recommended RAM for a Fabric server with mods is 6 GB.

Minimum RAM

A Fabric server with mods requires at least 6 GB of RAM. Plans with less RAM will fail to load mods.

Installation steps

  1. Open the official Fabric site and download the Executable Server (.jar) for the Minecraft, Loader, and Installer combination you want.
  2. Go to https://panel.nexuscloud.id/ and select your server.
  3. Open the Files menu, click Upload Files, and upload the Fabric installer you just downloaded. Wait until the upload finishes.
  4. Click the three-dot icon (⋮) next to the uploaded file, choose Rename, and rename it to fabric-server-launch.jar.
  5. Open the Startup menu, then:
    • Fill in the Fabric version variables with your combination, for example 1.21.4, 0.16.2, 1.0.2.
    • If available, change Server Jar File from server.jar to fabric-server-launch.jar.
    • Switch Docker Image to Java 21 Temurin if you are using Minecraft 1.21 or newer.
  6. Open the Console menu, then click Start to boot the server.
  7. Wait until the console shows the server is ready to accept connections, then try joining from the Minecraft client.

Changing the Fabric version

If you want to switch to a different Fabric version:

  1. Delete the old mods and world folders, and the old fabric-server-launch.jar file.
  2. Repeat steps 1-6 above with the new installer.

Important notes

  • The Fabric Loader version must match the Minecraft version you are using.
  • If the server fails to start, check the console for errors mentioning a Java version. Modern Fabric generally requires Java 17 or higher.
  • Always back up your world before changing the Fabric version or adding new mods.

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Cheers, Team NexusCloud