[bakunin] add disko device

flake.nix

@@ -10,6 +10,8 @@
     mfsync.url = "github:k4lipso/mfsync";
     microvm.url = "github:astro/microvm.nix";
     microvm.inputs.nixpkgs.follows = "nixpkgs";
+    inputs.disko.url = "github:nix-community/disko/latest";
+    inputs.disko.inputs.nixpkgs.follows = "nixpkgs";
 
     utils = {
       url = "github:numtide/flake-utils";

machines/configuration.nix

@@ -83,12 +83,13 @@ in
     ];
   };
 
-
   bakunin = nixosSystem {
     system = "x86_64-linux";
     specialArgs.inputs = inputs;
     modules = defaultModules ++ [
       ./bakunin/configuration.nix
+      inputs.disko.nixosModules.disko
+      ./modules/disko/btrfs-laptop.nix
     ];
   };
 

machines/modules/disko/btrfs-laptop.nix

@@ -0,0 +1,63 @@
+{ config, self, inputs, ... }:
+
+{
+  imports = [
+    inputs.disko.nixosModules.disko
+  ];
+
+  # https://github.com/nix-community/disko/blob/master/example/luks-btrfs-subvolumes.nix
+  disko.devices = {
+    disk = {
+      main = {
+        type = "disk";
+        # When using disko-install, we will overwrite this value from the commandline
+        device = "/dev/disk/by-id/some-disk-id";
+        content = {
+          type = "gpt";
+          partitions = {
+            ESP = {
+              size = "512M";
+              type = "EF00";
+              content = {
+                type = "filesystem";
+                format = "vfat";
+                mountpoint = "/boot";
+                mountOptions = [ "umask=0077" ];
+              };
+            };
+            luks = {
+              size = "100%";
+              content = {
+                type = "luks";
+                name = "crypted";
+                  passwordFile = "/tmp/secret.key"; # Interactive
+                content = {
+                  type = "btrfs";
+                  extraArgs = [ "-f" ];
+                  subvolumes = {
+                    "/root" = {
+                      mountpoint = "/";
+                      mountOptions = [ "compress=zstd" "noatime" ];
+                    };
+                    "/home" = {
+                      mountpoint = "/home";
+                      mountOptions = [ "compress=zstd" "noatime" ];
+                    };
+                    "/nix" = {
+                      mountpoint = "/nix";
+                      mountOptions = [ "compress=zstd" "noatime" ];
+                    };
+                    "/swap" = {
+                      mountpoint = "/.swapvol";
+                      swap.swapfile.size = "20M";
+                    };
+                  };
+                };
+              };
+            };
+          };
+        };
+      };
+    };
+  };
+}