nix-builder disko

2026-10-06 07:08:12 +09:00 · 2026-09-02 21:36:23 +09:00
parent c53a0c0bed
commit 0ff78c6848
5 changed files with 82 additions and 47 deletions
@@ -0,0 +1,66 @@
+_:
+let
+  osDisk = "/dev/disk/by-id/scsi-0QEMU_QEMU_HARDDISK_drive-scsi0";
+in
+{
+  disko.enableConfig = true;
+
+  # The VM disks already contain live filesystems. Model each existing
+  # filesystem without giving Disko ownership of their partitioning or data.
+  disko.devices.disk = {
+    boot = {
+      type = "disk";
+      device = "${osDisk}-part1";
+      destroy = false;
+
+      content = {
+        type = "filesystem";
+        format = "vfat";
+        mountpoint = "/boot";
+        mountOptions = [ "umask=0077" ];
+      };
+    };
+
+    root = {
+      type = "disk";
+      device = "${osDisk}-part2";
+      destroy = false;
+
+      content = {
+        type = "filesystem";
+        format = "ext4";
+        mountpoint = "/";
+      };
+    };
+
+    nix-build = {
+      type = "disk";
+      device = "/dev/disk/by-id/scsi-0QEMU_QEMU_HARDDISK_drive-scsi1";
+      destroy = false;
+
+      content = {
+        type = "filesystem";
+        format = "ext4";
+        mountpoint = "/var/lib/nix-build";
+        mountOptions = [ "noatime" ];
+      };
+    };
+
+    nix-store = {
+      type = "disk";
+      device = "/dev/disk/by-id/scsi-0QEMU_QEMU_HARDDISK_drive-scsi2";
+      destroy = false;
+
+      content = {
+        type = "filesystem";
+        format = "ext4";
+        mountpoint = "/nix/store";
+        mountOptions = [ "noatime" ];
+      };
+    };
+  };
+
+  fileSystems."/nix/store".neededForBoot = true;
+  nix.settings.build-dir = "/var/lib/nix-build";
+  services.fstrim.enable = true;
+}