[docs] add vmWithDisko documentation

doc/src/anleitung/create.md

@@ -42,6 +42,25 @@ sudo nix --extra-experimental-features "flakes nix-command" run 'github:nix-comm
 # failed with no space left on device.
 # problem is lots of data is written to the local /nix/store which is mounted on tmpfs in ram
 # it seems that a workaround could be modifying the bootable stick to contain a swap partition to extend tmpfs storage
-
-
+```
+
+# Testing Disko
+Testing disko partitioning is working quite well. Just run the following and check the datasets in the vm:
+```bash
+nix run -L .\#nixosConfigurations.fanny.config.system.build.vmWithDisko
+```
+
+Only problem is that encryption is not working, so it needs to be commented out. For testing host fanny the following parts in ```./machines/modules/disko/fanny.nix``` need to be commented out(for both pools!):
+```nix
+datasets = {
+  encrypted = {
+    options = {
+      encryption = "aes-256-gcm"; #THIS ONE
+      keyformat = "passphrase"; #THIS ONE
+      keylocation = "file:///tmp/root.key"; #THIS ONE
+    };
+    # use this to read the key during boot
+     postCreateHook = '' #THIS ONE 
+       zfs set keylocation="prompt" "zroot/$name"; #THIS ONE 
+     ''; #THIS ONE 
 ```

machines/configuration.nix

@@ -99,7 +99,7 @@ in
     modules = defaultModules ++ [
       ./fanny/configuration.nix
       inputs.disko.nixosModules.disko
-      ./modules/disko/btrfs-laptop.nix
+      ./modules/disko/fanny.nix
     ];
   };
 

machines/fanny/configuration.nix

@@ -33,8 +33,11 @@
   services.acpid.enable = true;
 
   networking.hostName = "fanny";
+  networking.hostId = "1312acab";
   networking.networkmanager.enable = true;
 
+  virtualisation.vmVariant.virtualisation.graphics = false;
+
   time.timeZone = "Europe/Berlin";
   system.stateVersion = "23.05"; # Do.. Not.. Change..
 }

machines/modules/disko/btrfs-laptop.nix

@@ -30,7 +30,7 @@
               content = {
                 type = "luks";
                 name = "crypted";
-                  passwordFile = "/tmp/secret.key"; # Interactive
+                passwordFile = /tmp/secret.key; # Interactive
                 content = {
                   type = "btrfs";
                   extraArgs = [ "-f" ];

machines/modules/disko/fanny.nix

@@ -0,0 +1,141 @@
+{
+  disko.devices = {
+    disk = {
+      ssd = {
+        type = "disk";
+        device = "/dev/sda";
+        content = {
+          type = "gpt";
+          partitions = {
+            ESP = {
+              size = "1024M";
+              type = "EF00";
+              content = {
+                type = "filesystem";
+                format = "vfat";
+                mountpoint = "/boot";
+                mountOptions = [ "umask=0077" ];
+              };
+            };
+            zfs = {
+              size = "100%";
+              content = {
+                type = "zfs";
+                pool = "zroot";
+              };
+            };
+          };
+        };
+      };
+
+      hdd0 = {
+        type = "disk";
+        device = "/dev/sdb";
+        content = {
+          type = "gpt";
+          partitions = {
+            zfs = {
+              size = "100%";
+              content = {
+                type = "zfs";
+                pool = "storage";
+              };
+            };
+          };
+        };
+      };
+
+      hdd1 = {
+        type = "disk";
+        device = "/dev/sdc";
+        content = {
+          type = "gpt";
+          partitions = {
+            zfs = {
+              size = "100%";
+              content = {
+                type = "zfs";
+                pool = "storage";
+              };
+            };
+          };
+        };
+      };
+    };
+
+    zpool = {
+      zroot = {
+        type = "zpool";
+        mode = "";
+        # Workaround: cannot import 'zroot': I/O error in disko tests
+        options.cachefile = "none";
+        rootFsOptions = {
+          compression = "zstd";
+          "com.sun:auto-snapshot" = "false";
+        };
+
+        datasets = {
+          encrypted = {
+            type = "zfs_fs";
+            options = {
+              mountpoint = "none";
+              encryption = "aes-256-gcm";
+              keyformat = "passphrase";
+              keylocation = "file:///tmp/root.key";
+            };
+            # use this to read the key during boot
+            postCreateHook = ''
+              zfs set keylocation="prompt" "zroot/$name";
+            '';
+          };
+          "encrypted/root" = {
+            type = "zfs_fs";
+            mountpoint = "/";
+          };
+          "encrypted/var" = {
+            type = "zfs_fs";
+            mountpoint = "/var";
+          };
+          "encrypted/etc" = {
+            type = "zfs_fs";
+            mountpoint = "/etc";
+          };
+          "encrypted/home" = {
+            type = "zfs_fs";
+            mountpoint = "/home";
+          };
+          "encrypted/nix" = {
+            type = "zfs_fs";
+            mountpoint = "/nix";
+          };
+        };
+      };
+
+      storage = {
+        type = "zpool";
+        mode = "mirror";
+
+        datasets = {
+          encrypted = {
+            type = "zfs_fs";
+            options = {
+              mountpoint = "none";
+              encryption = "aes-256-gcm";
+              keyformat = "passphrase";
+              keylocation = "file:///tmp/storage.key";
+            };
+
+            # use this to read the key during boot
+            postCreateHook = ''
+              zfs set keylocation="prompt" "zroot/$name";
+            '';
+          };
+          "encrypted/data" = {
+            type = "zfs_fs";
+            mountpoint = "/data";
+          };
+        };
+      };
+    };
+  };
+}