From 927cd07d84945f88b9cbefa9eee98c7a314717f1 Mon Sep 17 00:00:00 2001
From: JuliusFreudenberger <julius+git@jfreudenberger.de>
Date: Sat, 18 Jan 2025 20:48:49 +0200
Subject: [PATCH] Add configuration for backup raspberry

---
 flake.nix                                     | 12 +++
 hosts/backup-raspberrypi/.gitignore           |  1 +
 hosts/backup-raspberrypi/default.nix          | 77 +++++++++++++++++++
 .../hardware-configuration.nix                | 33 ++++++++
 4 files changed, 123 insertions(+)
 create mode 100644 hosts/backup-raspberrypi/.gitignore
 create mode 100644 hosts/backup-raspberrypi/default.nix
 create mode 100644 hosts/backup-raspberrypi/hardware-configuration.nix

diff --git a/flake.nix b/flake.nix
index dc02f56..c48f0f9 100644
--- a/flake.nix
+++ b/flake.nix
@@ -72,7 +72,19 @@
               home-manager.users.${username} = import ./users/${username}/home.nix;
             }
         ];
+      };
 
+      backup-raspberrypi = nixpkgs.lib.nixosSystem rec {
+        system = "aarch64";
+
+        specialArgs = {
+          inherit inputs outputs;
+        };
+
+        modules = [
+          nixos-hardware.nixosModules.raspberry-pi-4
+          ./hosts/backup-raspberrypi
+        ];
       };
     };
   };
diff --git a/hosts/backup-raspberrypi/.gitignore b/hosts/backup-raspberrypi/.gitignore
new file mode 100644
index 0000000..3ad48c3
--- /dev/null
+++ b/hosts/backup-raspberrypi/.gitignore
@@ -0,0 +1 @@
+teleport-cred.nix
diff --git a/hosts/backup-raspberrypi/default.nix b/hosts/backup-raspberrypi/default.nix
new file mode 100644
index 0000000..8f44813
--- /dev/null
+++ b/hosts/backup-raspberrypi/default.nix
@@ -0,0 +1,77 @@
+# Edit this configuration file to define what should be installed on
+# your system.  Help is available in the configuration.nix(5) man page
+# and in the NixOS manual (accessible by running ‘nixos-help’).
+
+{ outputs, config, pkgs, ... }:
+
+{
+  imports =
+    [
+      ../../modules/nix.nix
+      ../../modules/network-server.nix
+      ../../modules/locale.nix
+      ../../modules/server-cli.nix
+      ../../modules/teleport.nix
+      ./teleport-cred.nix
+
+      # Include the results of the hardware scan.
+      ./hardware-configuration.nix
+    ];
+
+    nixpkgs = {
+      overlays = [
+        outputs.overlays.additions
+      ];
+    };
+
+  # Bootloader.
+  # Use the extlinux boot loader. (NixOS wants to enable GRUB by default)
+  boot.loader.grub.enable = false;
+  # Enables the generation of /boot/extlinux/extlinux.conf
+  boot.loader.generic-extlinux-compatible.enable = true;
+
+  fileSystems."/backups" = 
+    { device = "/dev/disk/by-uuid/7ccdab55-fba4-47b8-aef2-74be0103f885";
+      fsType = "btrfs";
+    };
+
+  networking.hostName = "backup-raspberry"; # Define your hostname.
+
+  users = {
+    users = {
+      julius = {
+        isNormalUser = true;
+        uid = 1000;
+        extraGroups = [ "wheel" "julius" ];
+      };
+      restic = {
+        isNormalUser = true;
+        uid = 1337;
+        extraGroups = [ "restic" ];
+      };
+    };
+    groups = {
+      julius = { 
+        gid = 1000;
+      };
+      restic = { 
+        gid = 1337;
+      };
+    };
+  };
+
+  location = {
+    latitude = 48.740556;
+    longitude = 9.310833;
+  };
+
+  # This value determines the NixOS release from which the default
+  # settings for stateful data, like file locations and database versions
+  # on your system were taken. It‘s perfectly fine and recommended to leave
+  # this value at the release version of the first install of this system.
+  # Before changing this value read the documentation for this option
+  # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
+  system.stateVersion = "24.11"; # Did you read the comment?
+
+}
+
diff --git a/hosts/backup-raspberrypi/hardware-configuration.nix b/hosts/backup-raspberrypi/hardware-configuration.nix
new file mode 100644
index 0000000..236445a
--- /dev/null
+++ b/hosts/backup-raspberrypi/hardware-configuration.nix
@@ -0,0 +1,33 @@
+# Do not modify this file!  It was generated by ‘nixos-generate-config’
+# and may be overwritten by future invocations.  Please make changes
+# to /etc/nixos/configuration.nix instead.
+{ config, lib, pkgs, modulesPath, ... }:
+
+{
+  imports =
+    [ (modulesPath + "/installer/scan/not-detected.nix")
+    ];
+
+  boot.initrd.availableKernelModules = [ "xhci_pci" ];
+  boot.initrd.kernelModules = [ ];
+  boot.kernelModules = [ ];
+  boot.extraModulePackages = [ ];
+
+  fileSystems."/" =
+    { device = "/dev/disk/by-label/NIXOS_SD";
+      fsType = "ext4";
+    };
+
+  swapDevices = [ ];
+
+  # Enables DHCP on each ethernet and wireless interface. In case of scripted networking
+  # (the default) this is the recommended approach. When using systemd-networkd it's
+  # still possible to use this option, but it's recommended to use it in conjunction
+  # with explicit per-interface declarations with `networking.interfaces.<interface>.useDHCP`.
+  networking.useDHCP = lib.mkDefault true;
+  # networking.interfaces.end0.useDHCP = lib.mkDefault true;
+  # networking.interfaces.wlan0.useDHCP = lib.mkDefault true;
+
+  nixpkgs.hostPlatform = lib.mkDefault "aarch64-linux";
+}
+