config(mcl-disko): Add ext4 primary partition type

Author: MartinNikov

modules/mcl-disko/default.nix

@@ -18,11 +18,15 @@
       options.mcl.disko = {
         enable = mkEnableOption "Enable Module";
 
-        legacyBoot = mkOption {
-          type = types.bool;
-          default = false;
-          example = true;
-          description = "Declare if the configuration is for a Hetzner server or not";
+        primaryPartitionType = mkOption {
+          type = types.enum [
+            "zfs"
+            "legacyBoot"
+            "ext4"
+          ];
+          default = "zfs";
+          example = "legacyBoot";
+          description = "Declare the type of the primary partition";
         };
 
         swapSize = mkOption {
@@ -140,7 +144,7 @@
 
       config.disko =
         let
-          makePrimaryZfsDisk = import ./primaryZfsPartition.nix;
+          makePrimaryZfsDisk = import ./primaryPartition;
           makeSecondaryZfsDisk = import ./secondaryZfsPartition.nix;
 
           first = builtins.head cfg.disks;
@@ -159,7 +163,7 @@
                     isSecondary = true;
                     espSize = cfg.espSize;
                     swapSize = cfg.swapSize;
-                    legacyBoot = cfg.legacyBoot;
+                    primaryPartitionType = cfg.primaryPartitionType;
                     poolName = cfg.zpool.name;
                   }
                 else
@@ -180,14 +184,15 @@
                 isSecondary = false;
                 espSize = cfg.espSize;
                 swapSize = cfg.swapSize;
-                legacyBoot = cfg.legacyBoot;
+                primaryPartitionType = cfg.primaryPartitionType;
                 poolName = cfg.zpool.name;
               };
             };
             zpool = import ./zpool.nix {
               poolName = cfg.zpool.name;
               poolMode = cfg.zpool.mode;
               poolExtraDatasets = cfg.zpool.extraDatasets;
+              primaryPartitionType = cfg.primaryPartitionType;
               inherit lib;
             };
           };

modules/mcl-disko/primaryPartition/default.nix

@@ -0,0 +1,41 @@
+{
+  lib,
+  disk,
+  isSecondary,
+  espSize,
+  swapSize,
+  primaryPartitionType,
+  poolName,
+}:
+{
+  type = "disk";
+  device = disk;
+  content = {
+    type = if primaryPartitionType == "legacyBoot" then "table" else "gpt";
+    partitions =
+      if primaryPartitionType == "legacyBoot" then
+        import ./zfs-legacy-boot.nix {
+          inherit
+            isSecondary
+            espSize
+            swapSize
+            poolName
+            ;
+        }
+      else if primaryPartitionType == "ext4" then
+        import ./ext4.nix { inherit espSize; }
+      else
+        import ./zfs.nix {
+          inherit
+            disk
+            isSecondary
+            espSize
+            swapSize
+            poolName
+            ;
+        };
+  }
+  // lib.optionalAttrs (primaryPartitionType == "legacyBoot") {
+    format = "gpt";
+  };
+}

modules/mcl-disko/primaryPartition/ext4.nix

@@ -0,0 +1,21 @@
+{ espSize }:
+{
+  ESP = {
+    type = "EF00";
+    size = espSize;
+    content = {
+      type = "filesystem";
+      format = "vfat";
+      mountpoint = "/boot";
+      mountOptions = [ "umask=0077" ];
+    };
+  };
+  nixos = {
+    size = "100%";
+    content = {
+      type = "filesystem";
+      format = "ext4";
+      mountpoint = "/";
+    };
+  };
+}

modules/mcl-disko/primaryPartition/zfs-legacy-boot.nix

@@ -0,0 +1,46 @@
+{
+  isSecondary,
+  espSize,
+  swapSize,
+  poolName,
+}:
+[
+  {
+    name = "boot";
+    start = "1MiB";
+    end = "2MiB";
+    part-type = "primary";
+    flags = [ "bios_grub" ];
+  }
+  {
+    name = "ESP";
+    start = "2MiB";
+    end = espSize;
+    bootable = true;
+    content = {
+      type = "filesystem";
+      format = "vfat";
+      mountpoint = if isSecondary then null else "/boot";
+    };
+  }
+  {
+    name = "zfs";
+    start = espSize;
+    end = "-${swapSize}";
+    part-type = "primary";
+    content = {
+      type = "zfs";
+      pool = "${poolName}";
+    };
+  }
+  {
+    name = "swap";
+    start = "-${swapSize}";
+    end = "100%";
+    part-type = "primary";
+    content = {
+      type = "swap";
+      randomEncryption = true;
+    };
+  }
+]

modules/mcl-disko/primaryPartition/zfs.nix

@@ -0,0 +1,39 @@
+{
+  disk,
+  isSecondary,
+  espSize,
+  swapSize,
+  poolName,
+}:
+{
+  "ESP" = {
+    device = "${disk}-part1";
+    size = espSize;
+    type = "EF00";
+    content = {
+      type = "filesystem";
+      format = "vfat";
+      mountpoint = if isSecondary then null else "/boot";
+      mountOptions = [ "umask=0077" ];
+    };
+  };
+
+  "zfs" = {
+    device = "${disk}-part2";
+    end = "-${swapSize}";
+    type = "BF00";
+    content = {
+      type = "zfs";
+      pool = "${poolName}";
+    };
+  };
+
+  "swap" = {
+    device = "${disk}-part3";
+    size = swapSize;
+    content = {
+      type = "swap";
+      randomEncryption = true;
+    };
+  };
+}