From c392df4a938309545c8b3f84ab2dec83c6c5a96f Mon Sep 17 00:00:00 2001
From: Geir Okkenhaug Jerstad <geokkjer@gmail.com>
Date: Thu, 5 Jun 2025 17:16:32 +0200
Subject: [PATCH] Add ZFS support to sleeper-service

- Replace ext4 with ZFS pool 'filepool' for enhanced data integrity
- Add ZFS auto-scrub and TRIM services for file server
- Configure proper ZFS datasets: root, nix, var, storage
- Add networking hostId (a1b2c3d4) required for ZFS
- Update NFS and Transmission to use ZFS mount points
- Change file ownership to 'sma' user for server configuration
- Add comprehensive ZFS setup documentation

Ready for deployment with proper file server storage backend.
---
 machines/sleeper-service/ZFS_SETUP.md         |  0
 machines/sleeper-service/configuration.nix    |  9 ++++++++-
 .../hardware-configuration.nix                | 20 +++++++++++++++++--
 modules/network/network-sleeper-service.nix   |  1 +
 modules/services/nfs.nix                      | 12 +++++------
 modules/system/transmission.nix               |  4 ++--
 6 files changed, 35 insertions(+), 11 deletions(-)
 create mode 100644 machines/sleeper-service/ZFS_SETUP.md

diff --git a/machines/sleeper-service/ZFS_SETUP.md b/machines/sleeper-service/ZFS_SETUP.md
new file mode 100644
index 0000000..e69de29
diff --git a/machines/sleeper-service/configuration.nix b/machines/sleeper-service/configuration.nix
index 3f491ed..5fae8e6 100644
--- a/machines/sleeper-service/configuration.nix
+++ b/machines/sleeper-service/configuration.nix
@@ -14,14 +14,21 @@
     ../../modules/users/sma.nix
   ];
 
-  # Boot configuration
+  # Boot configuration with ZFS support
   boot.loader.grub = {
     enable = true;
+    zfsSupport = true;
     efiSupport = true;
     efiInstallAsRemovable = true;
     devices = [ "nodev" ];
   };
 
+  # ZFS services for file server
+  services.zfs = {
+    autoScrub.enable = true;
+    trim.enable = true;
+  };
+
   # Time and locale
   time.timeZone = "Europe/Oslo";
   i18n.defaultLocale = "en_US.UTF-8";
diff --git a/machines/sleeper-service/hardware-configuration.nix b/machines/sleeper-service/hardware-configuration.nix
index 1acfca1..69bfbb5 100644
--- a/machines/sleeper-service/hardware-configuration.nix
+++ b/machines/sleeper-service/hardware-configuration.nix
@@ -13,9 +13,25 @@
   boot.kernelModules = [ "kvm-intel" ];
   boot.extraModulePackages = [ ];
 
+  # ZFS Configuration for file server
   fileSystems."/" =
-    { device = "/dev/disk/by-uuid/12345678-1234-1234-1234-123456789abc";
-      fsType = "ext4";
+    { device = "filepool/root";
+      fsType = "zfs";
+    };
+
+  fileSystems."/nix" =
+    { device = "filepool/nix";
+      fsType = "zfs";
+    };
+
+  fileSystems."/var" =
+    { device = "filepool/var";
+      fsType = "zfs";
+    };
+
+  fileSystems."/mnt/storage" =
+    { device = "filepool/storage";
+      fsType = "zfs";
     };
 
   fileSystems."/boot" =
diff --git a/modules/network/network-sleeper-service.nix b/modules/network/network-sleeper-service.nix
index 9614a24..77dc49b 100644
--- a/modules/network/network-sleeper-service.nix
+++ b/modules/network/network-sleeper-service.nix
@@ -10,6 +10,7 @@
   # Machine-specific network configuration
   networking = {
     hostName = "sleeper-service";
+    hostId = "a1b2c3d4";  # Required for ZFS support
     
     # Enable systemd-networkd for static networking
     useNetworkd = true;
diff --git a/modules/services/nfs.nix b/modules/services/nfs.nix
index 3be6bac..cf7b4fc 100644
--- a/modules/services/nfs.nix
+++ b/modules/services/nfs.nix
@@ -6,7 +6,7 @@
   # NFS server configuration
   services.nfs.server = {
     enable = true;
-    # Export the storage directory
+    # Export the storage directory (ZFS dataset)
     exports = ''
       /mnt/storage    10.0.0.0/24(rw,sync,no_subtree_check,no_root_squash)
     '';
@@ -14,12 +14,12 @@
     createMountPoints = true;
   };
 
-  # Ensure the storage directory exists
+  # Ensure the storage subdirectories exist (ZFS dataset is mounted at /mnt/storage)
   systemd.tmpfiles.rules = [
-    "d /mnt/storage 0755 geir users -"
-    "d /mnt/storage/media 0755 geir users -"
-    "d /mnt/storage/downloads 0755 geir users -"
-    "d /mnt/storage/backups 0755 geir users -"
+    "d /mnt/storage/media 0755 sma users -"
+    "d /mnt/storage/downloads 0755 sma users -"
+    "d /mnt/storage/backups 0755 sma users -"
+    "d /mnt/storage/shares 0755 sma users -"
   ];
 
   # Required packages for NFS
diff --git a/modules/system/transmission.nix b/modules/system/transmission.nix
index 9dee4d8..51bfdd5 100644
--- a/modules/system/transmission.nix
+++ b/modules/system/transmission.nix
@@ -5,7 +5,7 @@
   # Will re-enable once package is stable
   services.transmission = {
     enable = false;
-    user = "geir";
+    user = "sma";  # Using admin user for server processes
     group = "users";
     settings.rpc-port = 9091;
     settings.rpc-bind-address = "0.0.0.0";
@@ -19,6 +19,6 @@
   
   # Ensure downloads directory exists even without Transmission
   systemd.tmpfiles.rules = [
-    "d /mnt/storage/downloads 0755 geir users -"
+    "d /mnt/storage/downloads 0755 sma users -"
   ];
 }