hosts/hazel: init

hosts/hazel/default.nix

@@ -0,0 +1,22 @@
+{ modules, ... }: {
+  networking.hostName = "hazel";
+  system.stateVersion = "24.11";
+  time.timeZone = "Australia/Melbourne";
+
+  imports = with modules.system; [
+    home-manager
+
+    base
+    kernel
+    nix-stable
+    packages
+    security
+
+    ./filesystem.nix
+    ./kernel.nix
+    ./networking.nix
+    ./packages.nix
+
+    ../../users/hana
+  ];
+}

hosts/hazel/filesystem.nix

@@ -0,0 +1,53 @@
+{ ... }:
+let
+  mkLabelMount = label: type: options: {
+    device = "/dev/disk/by-label/${label}";
+    fsType = type;
+    options = options;
+  };
+  mkBtrfsMount = name: ext: subvol: atime: mkLabelMount name "btrfs"
+  [
+    "autodefrag"
+    "compress=zstd:4"
+    "compress-force=zstd:4"
+    "defaults"
+    "nossd"
+    "space_cache=v2"
+    "subvol=${subvol}"
+    (if atime then "relatime" else "noatime")
+  ] ++ ext;
+
+  mkHazelMount = mkBtrfsMount "HAZEL" [ "noauto" ];
+in
+{
+  boot.supportedFilesystems = [ "btrfs" ];
+  fileSystems = {
+    "/" = {
+      device = "rootfs";
+      fsType = "tmpfs";
+      options = [ "defaults" "mode=755" ];
+    };
+    "/boot" = mkLabelMount "ROOT" "vfat" [];
+
+    "/flower" = mkHazelMount "/current/flower" true;
+    "/persist" = mkHazelMount "/current/persist" true;
+    "/var" = mkHazelMount "/current/var" true;
+    "/nix" = mkHazelMount "/current/nix" false;
+
+    "/mnt" = mkHazelMount "/" true;
+  };
+
+  services.snapper.cleanupInterval = "1h";
+  services.snapper.configs.flower = {
+      FSTYPE = "btrfs";
+      SUBVOLUME = "/mnt/current/flower";
+      TIMELINE_CLEANUP = true;
+      TIMELINE_CREATE = true;
+      TIMELINE_MIN_AGE = "1800";
+      TIMELINE_LIMIT_HOURLY = "5";
+      TIMELINE_LIMIT_DAILY = "7";
+      TIMELINE_LIMIT_WEEKLY = "0";
+      TIMELINE_LIMIT_MONTHLY = "0";
+      TIMELINE_LIMIT_YEARLY = "0";
+    };
+}

hosts/hazel/kernel.nix

@@ -0,0 +1,10 @@
+{ ... }: {
+  boot = {
+    loader = {
+      efi.canTouchEfiVariables = true;
+      systemd-boot.enable = true;
+    };
+    initrd.availableKernelModules = [ "xhci_pci" "ahci" "usbhid" "usb_storage" "sd_mod" ];
+    kernelModules = [ "kvm-amd" ];
+  };
+}

hosts/hazel/networking.nix

@@ -0,0 +1,5 @@
+{ config, ... }: {
+  networking = {
+    useDHCP = true;
+  };
+}