nix-agent

Packages kolide/launcher for Nix.

Running kolide-launcher

Include kolide-launcher in your /etc/nixos/flake.nix inputs:

kolide-launcher = {
  url = "github:/kolide/nix-agent/main";
  inputs.nixpkgs.follows = "nixpkgs";
};

Deploy your enrollment secret to /etc/kolide-k2/secret. This can be done e.g. by adding it to /etc/nixos/configuration.nix:

environment.etc."kolide-k2/secret" = {
  mode = "0600";
  text = "<enrollment secret goes here>";
};

The enrollment secret can be discovered by viewing /etc/kolide-k2/secret (on macOS/Linux) or C:\Program Files\Kolide\Launcher-kolide-k2\conf\secret (on Windows) on an existing installation. If an existing installation is not available, then the secret may be extracted from one of the packages available for your tenant -- e.g. you can download kolide-launcher.deb, run nix-shell -p dpkg to make the dpkg-deb tool available, and then use dpkg-deb to extract the contents of the deb and view the resulting <archive directory>/etc/kolide-k2/secret file.

This enrollment secret should be kept confidential.

In /etc/nixos/configuration.nix, ensure that the kolide-launcher service is enabled:

services.kolide-launcher.enable = true;

Developing and testing in a VM

Create a VM using a NixOS 23.11 image with flakes enabled and SSH to the new VM.

Make a directory for the launcher flake and copy your changes to flake.nix and flake.lock into it. Make the subdirectory modules/kolide-launcher and copy your changes to default.nix into it.

Validate the flake with NIXPKGS_ALLOW_UNFREE=1 nix flake check --impure; view info about it with nix flake show and nix flake metadata.

Build the flake with NIXPKGS_ALLOW_UNFREE=1 nix build --impure. If all goes well, you will have a new result directory that symlinks to the Nix store location /nix/store/<...>-kolide-launcher.

Update your /etc/nixos/configuration.nix file to include and enable the launcher service; adjust other config values as needed:

{ inputs }:
{ config, pkgs, ... }:
{
  # ...
  environment.systemPackages = with pkgs; [
    # ...
    inputs.kolide-launcher
  ];

  services.kolide-launcher = {
    enable = true;
    kolideHostname = "k2device-preprod.kolide.com";
    rootDirectory = "/var/kolide-k2/k2device-preprod.kolide.com";
    updateChannel = "nightly";
  };
}

Update your /etc/nixos/flake.nix file to include kolide-launcher in its input and output:

{
  # ...

  inputs = {
    kolide-launcher = {
      url = "path:/path/to/your/kolide-launcher/flake/directory";
      inputs.nixpkgs.follows = "nixpkgs";
    };

  };

  outputs = { self, nixpkgs, kolide-launcher, ... }@inputs: {
    nixosConfigurations = {
      "my-hostname" = nixpkgs.lib.nixosSystem {
        system = "x86_64-linux";
        modules = [
          (import ./configuration.nix { inherit inputs; })
          kolide-launcher.nixosModules.kolide-launcher
        ];
      };
    };
  };
}

Then rebuild: sudo NIXPKGS_ALLOW_UNFREE=1 nixos-rebuild switch --flake /etc/nixos#my-hostname --impure.

Setting up your enrollment secret

You can manually create your secret file:

echo -n 'your-enroll-secret-goes-here' | sudo tee /etc/kolide-k2/secret

Then start the kolide-launcher.service service.

You can also configure the secret in /etc/nixos/configuration.nix.

environment.etc."kolide-k2/secret" = {
  mode = "0600";
  text = "<enrollment secret goes here>";
};

Running tests

NixOS tests live in the ./tests directory and are included via flake checks. They are currently intended to run in CI only.

Running the mock agent server

To run the mock agent server locally for testing purposes, you can run python3 -m flask --app agentserver run from the tests directory.