From 8f2d90b53559226cd508f3e29d9012cf9ccb3f1d Mon Sep 17 00:00:00 2001
From: Gonne <gonne@mathebau.de>
Date: Mon, 18 Dec 2023 17:55:00 +0100
Subject: [PATCH] Create backuphost Bragi

---
 nixos/machines/bragi/configuration.nix        | 15 ++++++++
 .../machines/bragi/hardware-configuration.nix | 36 +++++++++++++++++++
 nixos/machines/bragi/network.nix              | 16 +++++++++
 nixos/modules/borgbackup.nix                  | 32 +++++++++++++++++
 nixos/roles/hardware.nix                      |  4 +--
 5 files changed, 101 insertions(+), 2 deletions(-)
 create mode 100644 nixos/machines/bragi/configuration.nix
 create mode 100644 nixos/machines/bragi/hardware-configuration.nix
 create mode 100644 nixos/machines/bragi/network.nix
 create mode 100644 nixos/modules/borgbackup.nix

diff --git a/nixos/machines/bragi/configuration.nix b/nixos/machines/bragi/configuration.nix
new file mode 100644
index 0000000..f74fbb9
--- /dev/null
+++ b/nixos/machines/bragi/configuration.nix
@@ -0,0 +1,15 @@
+{
+  imports = [
+    ./hardware-configuration.nix
+    ../../roles
+    ../../roles/hardware.nix
+    ./network.nix
+    ../../modules/borgbackup.nix
+  ];
+
+  services.mathebau-borgbackup.enable = true;
+
+  # System configuration here
+  networking.hostName = "bragi";
+  system.stateVersion = "23.11";
+}
diff --git a/nixos/machines/bragi/hardware-configuration.nix b/nixos/machines/bragi/hardware-configuration.nix
new file mode 100644
index 0000000..d7f066a
--- /dev/null
+++ b/nixos/machines/bragi/hardware-configuration.nix
@@ -0,0 +1,36 @@
+{lib, ...}: {
+  imports = [];
+
+  fileSystems."/" = {
+    device = "gha-root";
+    fsType = "tmpfs";
+    options = ["size=1G" "mode=755"];
+  };
+  fileSystems."/persist" = {
+    device = "/dev/disk/by-uuid/b75e52a1-deee-45d4-b958-086bdaeb4fa4";
+    fsType = "btrfs";
+    options = ["subvol=persist"];
+    neededForBoot = true;
+  };
+  fileSystems."/boot" = {
+    device = "/dev/disk/by-uuid/6b86ec51-b854-4227-9b05-c8e15f7b2e62";
+    fsType = "ext4";
+  };
+  fileSystems."/nix" = {
+    device = "/dev/disk/by-uuid/b75e52a1-deee-45d4-b958-086bdaeb4fa4";
+    fsType = "btrfs";
+    options = ["subvol=nix"];
+  };
+  fileSystems."/var/lib/backups" = {
+    device = "/dev/disk/by-label/backups";
+    fsType = "btrfs";
+  };
+
+  #  swapDevices = [{device = "/dev/disk/by-uuid/";}]; #TODO
+
+  boot.loader.grub.device = "/dev/sda";
+
+  nix.settings.max-jobs = lib.mkDefault 4;
+
+  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
+}
diff --git a/nixos/machines/bragi/network.nix b/nixos/machines/bragi/network.nix
new file mode 100644
index 0000000..3d130f0
--- /dev/null
+++ b/nixos/machines/bragi/network.nix
@@ -0,0 +1,16 @@
+# We sohuld put that config somewhere in roles and give it a parameter or something,
+# everyone gets the same nameserver and the same prefixLength and address vs defaultGateway alsways
+# depend on the same thing
+{
+  imports = [];
+  networking = {
+    interfaces.enp0s25.ipv4.addresses = [
+      {
+        address = "192.168.1.11";
+        prefixLength = 24;
+      }
+    ];
+    defaultGateway = "192.168.1.137";
+    nameservers = ["130.83.2.22" "130.83.56.60" "130.83.22.60" "130.82.22.63"];
+  };
+}
diff --git a/nixos/modules/borgbackup.nix b/nixos/modules/borgbackup.nix
new file mode 100644
index 0000000..96de1fa
--- /dev/null
+++ b/nixos/modules/borgbackup.nix
@@ -0,0 +1,32 @@
+{
+  config,
+  lib,
+  ...
+}: let
+  inherit
+    (lib)
+    mkIf
+    mkEnableOption
+    ;
+  cfg = config.services.mathebau-borgbackup;
+in {
+  imports = [];
+
+  options.services.mathebau-borgbackup = {
+    enable = mkEnableOption "mathebau borgbackup service";
+  };
+
+  config = mkIf cfg.enable {
+    services.borgbackup = {
+      repos = {
+        cthulhu = {
+          authorizedKeys = [
+            "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIMSJl1MvabUADTdOCgufsBzn1tIIpxMq4iDcYZsaW1lV Cthulhu Backup"
+          ];
+          path = "/var/lib/backups/cthulhu";
+          allowSubRepos = true;
+        };
+      };
+    };
+  };
+}
diff --git a/nixos/roles/hardware.nix b/nixos/roles/hardware.nix
index ac55bcc..2491df0 100644
--- a/nixos/roles/hardware.nix
+++ b/nixos/roles/hardware.nix
@@ -1,5 +1,5 @@
 {
   # Bootloader
-  boot.loader.systemd-boot.enable = true;
-  boot.loader.efi.canTouchEfiVariables = true;
+  boot.loader.grub.enable = true;
+  #  boot.loader.efi.canTouchEfiVariables = true;
 }