add zfs example

disk-configs/zfs.nix

@@ -0,0 +1,105 @@
+{
+  networking.hostId = "8425e349"; # needed for ZFS
+
+  disko.devices = {
+    disk = {
+      disk1 = {
+        type = "disk";
+        device = "/dev/nvme0n1";
+        content = {
+          type = "gpt";
+          partitions = {
+            boot = {
+              size = "1M";
+              type = "EF02"; # for grub MBR
+            };
+            ESP = {
+              size = "500M";
+              type = "EF00";
+              content = {
+                type = "mdraid";
+                name = "boot";
+              };
+            };
+            zfs = {
+              size = "100%";
+              content = {
+                type = "zfs";
+                pool = "zroot";
+              };
+            };
+          };
+        };
+      };
+      disk2 = {
+        type = "disk";
+        device = "/dev/nvme1n1";
+        content = {
+          type = "gpt";
+          partitions = {
+            boot = {
+              size = "1M";
+              type = "EF02"; # for grub MBR
+            };
+            ESP = {
+              size = "500M";
+              type = "EF00";
+              content = {
+                type = "mdraid";
+                name = "boot";
+              };
+            };
+            zfs = {
+              size = "100%";
+              content = {
+                type = "zfs";
+                pool = "zroot";
+              };
+            };
+          };
+        };
+      };
+    };
+    zpool = {
+      zroot = {
+        type = "zpool";
+        mode = "mirror";
+        rootFsOptions = {
+          compression = "lz4";
+          "com.sun:auto-snapshot" = "true";
+        };
+        rootFsOptions = {
+          mountpoint = "none";
+        };
+
+        datasets = {
+          "root" = {
+            type = "zfs_fs";
+            mountpoint = null;
+          };
+          "root/nixos" = {
+            type = "zfs_fs";
+            mountpoint = "/";
+          };
+          "root/home" = {
+            type = "zfs_fs";
+            mountpoint = "/home";
+          };
+        };
+      };
+    };
+
+    mdadm = {
+      boot = {
+        type = "mdadm";
+        level = 1;
+        metadata = "1.0";
+        content = {
+          type = "filesystem";
+          format = "vfat";
+          mountpoint = "/boot";
+        };
+      };
+    };
+  };
+}

flake.nix

@@ -21,11 +21,13 @@
         (nixpkgs.outPath + "/nixos/modules/installer/scan/not-detected.nix")
         disko.nixosModules.disko
         ./disk-configs/simple-efi.nix # choose your favorite disk layout here
+        #./disk-configs/zfs.nix # choose your favorite disk layout here
         {
           boot.loader.grub = {
             efiSupport = true;
             efiInstallAsRemovable = true;
           };
+          boot.swraid.enable = true;
           # Alternative to grub
           #boot.loader.systemd-boot.enable = true;
           # when installing toggle this