modules/nixos: add disko-zfs-swap

hosts/build01/default.nix

@@ -2,8 +2,8 @@
 {
   imports = [
     inputs.self.nixosModules.cgroups
-    inputs.self.nixosModules.community-builder
-    inputs.self.nixosModules.disko-zfs
+    #inputs.self.nixosModules.community-builder
+    inputs.self.nixosModules.disko-zfs-systemd-boot
     inputs.srvos.nixosModules.hardware-hetzner-online-amd
   ];
 

modules/nixos/common/default.nix

@@ -13,7 +13,7 @@
     ./security.nix
     ./sops-nix.nix
     ./telegraf.nix
-    ./update.nix
+    #./update.nix
     ./users.nix
     inputs.srvos.nixosModules.server
   ];

modules/nixos/disko-zfs-systemd-boot.nix

@@ -0,0 +1,75 @@
+{
+  config,
+  inputs,
+  lib,
+  ...
+}:
+let
+  devices = idx: {
+    type = "disk";
+    device = "/dev/nvme${idx}n1";
+    content = {
+      type = "gpt";
+      partitions = {
+        ESP = lib.mkIf (idx == "0") {
+          size = "1G";
+          type = "EF00";
+          content = {
+            type = "filesystem";
+            format = "vfat";
+            mountpoint = "/boot";
+            mountOptions = [ "nofail" ];
+          };
+        };
+        zfs = {
+          size = "100%";
+          content = {
+            type = "zfs";
+            pool = "zroot";
+          };
+        };
+      };
+    };
+  };
+in
+{
+  imports = [ inputs.disko.nixosModules.disko ];
+
+  boot.loader.systemd-boot.enable = true;
+
+  # the default zpool import services somehow times out while this import works fine?
+  boot.initrd.systemd.services.zfs-import-zroot.serviceConfig.ExecStartPre =
+    "${config.boot.zfs.package}/bin/zpool import -N -f zroot";
+
+  # Sometimes fails after the first try, with duplicate pool name errors
+  boot.initrd.systemd.services.zfs-import-zroot.serviceConfig.Restart = "on-failure";
+
+  disko.devices = {
+    disk = {
+      x = devices "0";
+      y = devices "1";
+    };
+    zpool = {
+      zroot = {
+        type = "zpool";
+        options = {
+          ashift = "12";
+        };
+        rootFsOptions = {
+          acltype = "posixacl";
+          atime = "off";
+          compression = "lz4";
+          mountpoint = "none";
+          xattr = "sa";
+          "com.sun:auto-snapshot" = "false";
+        };
+        datasets = {
+          root = {
+            type = "zfs_fs";
+            mountpoint = "/";
+          };
+        };
+      };
+    };
+  };
+}