nixos-anywhere

README.md

configuration.nix

{ modulesPath, config, lib, pkgs, ... }: {

  imports = [
    (modulesPath + "/installer/scan/not-detected.nix")
    (modulesPath + "/profiles/qemu-guest.nix")
    ./disk-config.nix
  ];

  system.stateVersion = "24.05";

  boot.loader.grub = {
    efiSupport = true;
    efiInstallAsRemovable = true;
  };

  users.users.root.openssh.authorizedKeys.keys = [
    "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIJVovMdf6giShd8J+UAkgAkJQ+UxmOK8yj96wmAQXFVr ari@vultr"
  ];

  environment.systemPackages = with pkgs; [
    aria
    neovim
  ];

  services.openssh.enable = true;
}

disk-config.nix

# https://github.com/nix-community/nixos-anywhere-examples/blob/9c0b066220ec82974c83c1f86fe39036a9036f80/disk-config.nix

# Example to create a bios compatible gpt partition
{ lib, ... }: {
  disko.devices = {
    disk.disk1 = {
      device = lib.mkDefault "/dev/sda";
      type = "disk";
      content = {
        type = "gpt";
        partitions = {
          boot = {
            name = "boot";
            size = "1M";
            type = "EF02";
          };
          esp = {
            name = "ESP";
            size = "500M";
            type = "EF00";
            content = {
              type = "filesystem";
              format = "vfat";
              mountpoint = "/boot";
            };
          };
          root = {
            name = "root";
            size = "100%";
            content = {
              type = "lvm_pv";
              vg = "pool";
            };
          };
        };
      };
    };
    lvm_vg = {
      pool = {
        type = "lvm_vg";
        lvs = {
          root = {
            size = "100%FREE";
            content = {
              type = "btrfs";
              extraArgs = [ "-f" ];
              subvolumes = {
                "@" = {
                  mountpoint = "/";
                  mountOptions = [ "compress=zstd" ];
                };
                "@home" = {
                  mountpoint = "/home";
                  mountOptions = [ "compress=zstd" ];
                };
                "@nix" = {
                  mountpoint = "/nix";
                  mountOptions = [ "compress=zstd" "noatime" ];
                };
                "@swap" = {
                  mountpoint = "/.swap";
                  mountOptions = [ "noatime" ];
                  swap.swapfile.size = lib.mkDefault "8G";
                };
              };
            };
          };
        };
      };
    };
  };
}

flake.lock

{
  "nodes": {
    "disko": {
      "inputs": {
        "nixpkgs": [
          "nixpkgs"
        ]
      },
      "locked": {
        "lastModified": 1718846788,
        "narHash": "sha256-9dtXYtEkmXoUJV+PGLqscqF7qTn4AIhAKpFWRFU2NYs=",
        "owner": "nix-community",
        "repo": "disko",
        "rev": "e1174d991944a01eaaa04bc59c6281edca4c0e6e",
        "type": "github"
      },
      "original": {
        "owner": "nix-community",
        "repo": "disko",
        "type": "github"
      }
    },
    "nixpkgs": {
      "locked": {
        "lastModified": 1718717462,
        "narHash": "sha256-qddfQLMaWR2gxfEzUM/zFZVK6H1kTv9WBQSBQxbP3MU=",
        "owner": "NixOS",
        "repo": "nixpkgs",
        "rev": "938aa157bbd6e3c6fd7dcb77998b1f92c2ad1631",
        "type": "github"
      },
      "original": {
        "owner": "NixOS",
        "ref": "nixos-24.05",
        "repo": "nixpkgs",
        "type": "github"
      }
    },
    "root": {
      "inputs": {
        "disko": "disko",
        "nixpkgs": "nixpkgs"
      }
    }
  },
  "root": "root",
  "version": 7
}

flake.nix

# https://github.com/nix-community/nixos-anywhere-examples/blob/9c0b066220ec82974c83c1f86fe39036a9036f80/flake.nix

{
  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixos-24.05";
  inputs.disko.url = "github:nix-community/disko";
  inputs.disko.inputs.nixpkgs.follows = "nixpkgs";

  outputs = { nixpkgs, disko, ... }: {
    nixosConfigurations.hetzner-cloud = nixpkgs.lib.nixosSystem {
      system = "x86_64-linux";
      modules = [
        { nix.nixPath = [ "nixpkgs=${nixpkgs}" ]; }
        disko.nixosModules.disko
        ./configuration.nix
      ];
    };
  };
}