# krops (krebs ops)

krops is a lightweigt toolkit to deploy NixOS systems, remotely or locally.

## Some Features

- store your secrets in [password store](https://www.passwordstore.org/)
- build your system remotely
- minimal overhead (it's basically just `nixos-rebuild switch`!)
- run from custom nixpkgs branch/checkout/fork

## Minimal Example

Create a file named `krops.nix` (name doesn't matter) with following content:

```
let
  krops = (import <nixpkgs> {}).fetchgit {
    url = https://cgit.krebsco.de/krops/;
    rev = "3022582ade8049e6ccf18f358cedb996d6716945";
    sha256 = "0k3zhv2830z4bljcdvf6ciwjihk2zzcn9y23p49c6sba5hbsd6jb";
  };

  lib = import "${krops}/lib";
  pkgs = import "${krops}/pkgs" {};

  source = lib.evalSource [{
    nixpkgs.git = {
      ref = "4b4bbce199d3b3a8001ee93495604289b01aaad3";
      url = https://github.com/NixOS/nixpkgs;
    };
    nixos-config.file = toString (pkgs.writeText "nixos-config" ''
      { pkgs, ... }: {
        fileSystems."/" = { device = "/dev/sda1"; };
        boot.loader.systemd-boot.enable = true;
        services.openssh.enable = true;
        environment.systemPackages = [ pkgs.git ];
      }
    '');
  }];
in
  pkgs.krops.writeDeploy "deploy" {
    source = source;
    target = "root@192.168.56.101";
  }
```

and run `$(nix-build --no-out-link krops.nix)` to deploy the target machine.

Under the hood, this will make the sources available on the target machine
below `/var/src`, and execute `nixos-rebuild switch -I /var/src`.

## References

- [In-depth example](http://tech.ingolf-wagner.de/nixos/krops/) by [Ingolf Wagner](https://ingolf-wagner.de/)