From 74dab0c38de9518a9a6c28571ed8961e6934c9cc Mon Sep 17 00:00:00 2001
From: Sam <samual.shop@proton.me>
Date: Fri, 5 Jul 2024 16:31:58 +0100
Subject: [PATCH] nebula zfs configuration and post-install-setup script

---
 hosts/common/disks/zfs/post-install-setup.sh |  3 +
 hosts/common/disks/zfs/zspeed.nix            | 73 ++++++++++++++++++++
 hosts/nebula/default.nix                     | 10 +--
 3 files changed, 81 insertions(+), 5 deletions(-)
 create mode 100755 hosts/common/disks/zfs/post-install-setup.sh
 create mode 100644 hosts/common/disks/zfs/zspeed.nix

diff --git a/hosts/common/disks/zfs/post-install-setup.sh b/hosts/common/disks/zfs/post-install-setup.sh
new file mode 100755
index 0000000..444f71d
--- /dev/null
+++ b/hosts/common/disks/zfs/post-install-setup.sh
@@ -0,0 +1,3 @@
+#!/usr/bin/env bash
+
+sudo nix --experimental-features "nix-command flakes" run github:nix-community/disko -- --mode disko ./zspeed.nix
diff --git a/hosts/common/disks/zfs/zspeed.nix b/hosts/common/disks/zfs/zspeed.nix
new file mode 100644
index 0000000..ead5709
--- /dev/null
+++ b/hosts/common/disks/zfs/zspeed.nix
@@ -0,0 +1,73 @@
+{
+  disko.devices = {
+    disk = {
+      x = {
+        type = "disk";
+        device = "/dev/disk/by-id/scsi-0QEMU_QEMU_HARDDISK_drive-scsi0";
+        content = {
+          type = "gpt";
+          partitions = {
+            zfs = {
+              size = "100%";
+              content = {
+                type = "zfs";
+                pool = "zspeed";
+              };
+            };
+          };
+        };
+      };
+      y = {
+        type = "disk";
+        device = "/dev/disk/by-id/scsi-0QEMU_QEMU_HARDDISK_drive-scsi3";
+        content = {
+          type = "gpt";
+          partitions = {
+            zfs = {
+              size = "100%";
+              content = {
+                type = "zfs";
+                pool = "zspeed";
+              };
+            };
+          };
+        };
+      };
+    };
+    zpool = {
+      zspeed = {
+        type = "zpool";
+        mode = "mirror";
+        rootFsOptions = {
+          "compression" = "zstd-4";
+          "com.sun:auto-snapshot" = "false";
+          "xattr" = "sa";
+          "atime" = "off";
+        };
+        options = {
+          "ashift" = "13";
+        };
+        postCreateHook = "zfs list -t snapshot -H -o name | grep -E '^zspeed@blank$' || zfs snapshot zspeed@blank";
+
+        datasets = {
+          postgres = {
+            type = "zfs_volume";
+            size = "10G -s";
+            options = {
+              "com.sun:auto-snapshot:daily" = "true";
+              "volblocksize" = "8k";
+            };
+          };
+          lxc = {
+            type = "zfs_volume";
+            size = "10G -s";
+            options = {
+              "com.sun:auto-snapshot:daily" = "true";
+              "volblocksize" = "8k";
+            };
+          };
+        };
+      };
+    };
+  };
+}
diff --git a/hosts/nebula/default.nix b/hosts/nebula/default.nix
index 9d341d1..366c277 100644
--- a/hosts/nebula/default.nix
+++ b/hosts/nebula/default.nix
@@ -1,11 +1,10 @@
-{ inputs, config, lib, pkgs, outputs, ... }:
+{ inputs, ... }:
 let
   # Disko setup
   fsType = "btrfs"; # one of ext4 or btrfs. Use btrfs if using impermanence
-  dev = "/dev/sda"; # depends on target hardware
+  dev = "/dev/disk/by-id/ata-QEMU_HARDDISK_QM00005"; # depends on target hardware
   encrypted = false; # currrently only applies to btrfs
   impermanence = false; # currrently only applies to btrfs
-  btrfsMountDevice = if encrypted then "/dev/mapper/crypted" else "/dev/root_vg/root";
   user = "admin";
 in
 {
@@ -14,7 +13,7 @@ in
       # Create users for this host
       ../common/users/${user}
 
-      # Disk configuration
+      # Root disk configuration
       inputs.disko.nixosModules.disko
       (import ../common/disks { device = dev; impermanence = impermanence; fsType = fsType; encrypted = encrypted; })
 
@@ -24,7 +23,7 @@ in
 
       # Import optional options
       ../common/optional/openssh.nix
-
+      ../common/optional/lxd
 
     ];
 
@@ -45,6 +44,7 @@ in
   boot.supportedFilesystems = [ "zfs" ];
   boot.zfs.forceImportRoot = false;
   networking.hostId = "18aec5d7";
+  boot.zfs.extraPools = [ "zspeed" ];
 
   services.libinput.enable = true;
 }