NixOS Compose Tutorial

Add a role to the composition

To add another role to the composition, we only need to add a new element to the set roles. Let us also rename the compute node to node and empty the testScript:

{ pkgs, ... }: {
  roles = {
    node = { pkgs, ... }:
      {
        # add needed package
        environment.systemPackages = with pkgs; [ openmpi ior ];
      };
    server = { pkgs, ... }:
      {
        # ...
      };
  };
  testScript = ''
  '';
}