How to Install Centrifugo on NixOS Latest

Centrifugo is a scalable real-time messaging server. It allows you to deliver messages to millions of clients in a reliable and secure way. This tutorial will take you through the process of installing Centrifugo on NixOS latest.

Prerequisites

Before installing Centrifugo, ensure that you have the following prerequisites in place:

• A NixOS latest server
• Access to the server as the root user or as a user with sudo privileges

Step 1: Enable the NixOS community packages

The community packages repository contains the Centrifugo package for NixOS. To enable the repository, add the following line to your /etc/nixos/configuration.nix file:

{
  #...
  nixpkgs.config.allowUnfree = true;
  nixpkgs.config = {
    packageOverrides = pkgs: {
      unstable = import (pkgs.fetchFromGitHub {
        owner = "NixOS";
        repo = "nixpkgs";
        rev = "95d900924957212ad9b1613424f3b4e4f7ba6af4";
        sha256 = "0m8n379f9g9ck76103ykhd8bxvll2d25lrzjplqs23sjry5z5q3r";
      }) {};
    };
  };
  #...
}

Assuming this file doesn't exist, create /etc/nixos/configuration.nix and paste the above code block without modifying the unstable parameter if you so wish.

Once you've made the change, run the nixos-rebuild switch command to apply the configuration changes.

$ sudo nixos-rebuild switch

You have now enabled the NixOS community packages repository.

Step 2: Install Centrifugo

To install Centrifugo, run the following command:

$ sudo nix-env -iA unstable.centrifugo

This command installs Centrifugo using the package from the NixOS community packages repository.

Step 3: Verify the installation

After installing Centrifugo, verify that the installation worked by checking that the centrifugo command is available.

$ centrifugo version
Centrifugo version 3.0.0

If the version number is returned, then the Centrifugo installation was successful.

Conclusion

Centrifugo is now installed on NixOS. You can now configure and start using Centrifugo by following the official documentation provided by the team at Centrifuge.